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急 幾題中一數唔識 英文 20點
發問:
急急急急 12月6日 零神5點前要救式+答案我都打左好耐我真係唔識...打錯字就sorry1.Fanny buys 2 metre of cloth for $24 per merter to make a shirt , Also , she spends $6 on cotton and buttons for the shirt.a)find the cost of the shirt.b)it she sells the shirt at a 40% profit , find the selling price of the shirt.2.a... 顯示更多 急急急急 12月6日 零神5點前要 救式+答案 我都打左好耐 我真係唔識... 打錯字就sorry 1.Fanny buys 2 metre of cloth for $24 per merter to make a shirt , Also , she spends $6 on cotton and buttons for the shirt. a)find the cost of the shirt. b)it she sells the shirt at a 40% profit , find the selling price of the shirt. 2.a shopkeeper buys a table for $460 and 6 chairs for $90 each. He sells the table at a profit of 30% and chairs at a loss of 5 % a)find the profit from selling the table. b)find the loss in selling all the chairs. c)find the overall percentage profit. 3.A watch is sold for $1840 at a profit of 15% . What should the selling price be such that the profit made is doubled? 4.22.5%,27.5% and 12% of the students in a secondary school are with types A ,B and AB blood respectively , and 456 students are with type O blood. a)what percentage of students are with type O blood? b) How many students are there in the school? c) Among the students with types A,B,AB and O blood,30%,60%,50% and 25%of them respectively are girls. What percentage of students in the school are girls? 5.There are 900 students in a school , and 405 of them are boys , Also,60% of the students are in junior forms , and 306 of them are girls. a)what percentage of the students are girls in the school? b)what percentage of the senior students are girls? c)how many boys are there in senior forms ?
最佳解答:
1. a) Cost of the shirt = $(24 x 2 + 6) = $54 b) Selling price of the shirt = $54 x (1 + 40%) = $75.6 ===== 2. a) Profit from selling the table = $460 x 30% = $138 b) Loss in selling all the chairs = $90 x 6 x 5% = $27 c) Overall percentage profit = [(138 - 27) / (460 + 90 x 6)] x 100% = 11.1% ===== 3. Cost of the watch = $1840 ÷ (1 + 15%) = $1600 The selling price such that the profit made is doubled = $1600 x (1 + 15% x 2) = $2080 ===== 4. a) Percentage of type O blood = 1 - (22.5% + 27.5% + 12%) = 38% b) Number of student in the school = 456 ÷ 38% = 1200 c) Percentage of girls = 22.5% x 30% + 27.5% x 60% + 12% x 50% + 38% x 25% = 38.75% ===== 5. a) Number of girls in the school = 900 - 405 = 495 b) Percentage of girls in senior forms = {(495 - 306) / [900 x (1 - 60%)]} x 100% = 52.5% c) Number of boys in senior forms = 900 x (1 - 60%) x (1 - 52.5%) = 171
其他解答:
急 幾題中一數唔識 英文 20點
發問:
急急急急 12月6日 零神5點前要救式+答案我都打左好耐我真係唔識...打錯字就sorry1.Fanny buys 2 metre of cloth for $24 per merter to make a shirt , Also , she spends $6 on cotton and buttons for the shirt.a)find the cost of the shirt.b)it she sells the shirt at a 40% profit , find the selling price of the shirt.2.a... 顯示更多 急急急急 12月6日 零神5點前要 救式+答案 我都打左好耐 我真係唔識... 打錯字就sorry 1.Fanny buys 2 metre of cloth for $24 per merter to make a shirt , Also , she spends $6 on cotton and buttons for the shirt. a)find the cost of the shirt. b)it she sells the shirt at a 40% profit , find the selling price of the shirt. 2.a shopkeeper buys a table for $460 and 6 chairs for $90 each. He sells the table at a profit of 30% and chairs at a loss of 5 % a)find the profit from selling the table. b)find the loss in selling all the chairs. c)find the overall percentage profit. 3.A watch is sold for $1840 at a profit of 15% . What should the selling price be such that the profit made is doubled? 4.22.5%,27.5% and 12% of the students in a secondary school are with types A ,B and AB blood respectively , and 456 students are with type O blood. a)what percentage of students are with type O blood? b) How many students are there in the school? c) Among the students with types A,B,AB and O blood,30%,60%,50% and 25%of them respectively are girls. What percentage of students in the school are girls? 5.There are 900 students in a school , and 405 of them are boys , Also,60% of the students are in junior forms , and 306 of them are girls. a)what percentage of the students are girls in the school? b)what percentage of the senior students are girls? c)how many boys are there in senior forms ?
最佳解答:
1. a) Cost of the shirt = $(24 x 2 + 6) = $54 b) Selling price of the shirt = $54 x (1 + 40%) = $75.6 ===== 2. a) Profit from selling the table = $460 x 30% = $138 b) Loss in selling all the chairs = $90 x 6 x 5% = $27 c) Overall percentage profit = [(138 - 27) / (460 + 90 x 6)] x 100% = 11.1% ===== 3. Cost of the watch = $1840 ÷ (1 + 15%) = $1600 The selling price such that the profit made is doubled = $1600 x (1 + 15% x 2) = $2080 ===== 4. a) Percentage of type O blood = 1 - (22.5% + 27.5% + 12%) = 38% b) Number of student in the school = 456 ÷ 38% = 1200 c) Percentage of girls = 22.5% x 30% + 27.5% x 60% + 12% x 50% + 38% x 25% = 38.75% ===== 5. a) Number of girls in the school = 900 - 405 = 495 b) Percentage of girls in senior forms = {(495 - 306) / [900 x (1 - 60%)]} x 100% = 52.5% c) Number of boys in senior forms = 900 x (1 - 60%) x (1 - 52.5%) = 171
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