Question

In a school class X has four sections A, B, C and D with total strength of 160 students. The probability of selecting a student from section A is 7/20, from section B is 1/5, and from section C is 3/10. Find the number of students in each section.​

Answer 1

let the no of students in sections be a,b,c and d

p(getting student from section A) = total student in section A/total no of students

a/160 = 7/20

= a = 160*7/20

a=56 students

p(e2)=b/160

b/160 = 1/5

b=160/5 =32

p(e3) = c/160

c/160=3/10.

c=160*3/10 =48

d= 160-(56+32+48) = 24

a= 56,b=32,c=48and d=24