38
There are 65 students in a class. Among them, Rs 39 is distributed so that each boy gets 80 paise and each girl gets 30 paise. Find the number of boys and girls in that class.
- A40 and 25
- B39 and 26
- C35 and 30
- D45 and 20
Answer not set
Discussion 1
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CCommunity
Average money per student = 3900/65 = 60 paise
Applying the allegation rule:
⇒ (80 - 60)/(60 - 30) = 2/3
⇒ Boys : Girls = 3 : 2
⇒ Number of boys = (65 × 3)/(3 + 2)
⇒ Number of boys = 39
⇒ Number of girls = 65 - 39 = 26
∴ Number of boys is 39 and girls is 26
Applying the allegation rule:
⇒ (80 - 60)/(60 - 30) = 2/3
⇒ Boys : Girls = 3 : 2
⇒ Number of boys = (65 × 3)/(3 + 2)
⇒ Number of boys = 39
⇒ Number of girls = 65 - 39 = 26
∴ Number of boys is 39 and girls is 26