Math, asked by Anonymous, 1 year ago

HELP!!!!!!!can anyone solve this? .....huh?

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Answered by gaurav2013c
1
Let the total no. of students be a

No. of students younger than 10 = a/2
No. Of students 10 year old = a/20
No. of students more than 10 but less than 20 = a/10


Now,
(a/20) + (a/2) +(a/10) + 70 = a
=> (a + 10a + 2a + 1400) /20 = a
=> 13a + 1400 = 20a
=> 20a - 13a = 1400
=> 7a = 1400
=> a = 200

No. of students who are 10 year old =200/20
= 10


Hope it will help you

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