math questions.....'?

👨🏻‍🏫 學術台數學

[匿名]

2007-12-02 10:41 am

in a music concert 9/13 of the audience were younsters.If there were 60 elderly people, find the total number of people in the audience...

回答 (3)

jaja_s8i

2007-12-02 10:49 am

✔ 最佳答案

4/13=60
(4/13=60)/4
1/13=15

9/13=135

135+60=195

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[匿名]

2007-12-02 6:50 pm

if 9/13 are youngsters then 4/13 are elderlies

4/13 = 60
1/13 = 60 / 4 = 15
9 * 15 = 135
Therefore, there are 135 youngsters

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[匿名]

2007-12-02 6:54 pm

60 = 4/13 means total audience is 60*13/4=(60/4)*13=15*13=195

參考: my head.. :D

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