Question

if the average marks in a certain test of boys and girls in a class are 80 and 85 respectively and if the average marks for the entire class are 83.75. Find the percentage of boys in the class.

Answer 1

Hey Dear,

● Answer -

Percentage of boys = 25 %

◆ Explanation -

Let x % be percentage of boys in class. Then percentage of girls will be 100-x % .

Average marks of whole class are calculated as -

Average marks = percentage of boys × avg marks of boys + percentage of girls × avg marks of girls

83.75 = 80 × x/100 + 85 × (100-x)/100

8375 = 80x + 8500 - 85x

85x - 80x = 8500 - 8375

5x = 125

x = 25

Therefore, percentage of boys in class will be 25 % .

Thanks dear ...

Answer 2

Answer:

the answer is the class has 25% of boys

Step-by-step explanation: