# Solve the following: The chances of P, Q and R, getting selected as principal of a college are 25,25,15 respectively. Their chances of introducing IT in the college are 12,13,14 respectively. Find th - Mathematics and Statistics

Sum

Solve the following:

The chances of P, Q and R, getting selected as principal of a college are 2/5, 2/5, 1/5 respectively. Their chances of introducing IT in the college are 1/2, 1/3, 1/4 respectively. Find the probability that IT is introduced in the college after one of them is selected as a principal

#### Solution

Let event P: P become principal.

event Q: Q become principal.

event R: R become principal.

event E: Subject IT is introduced.

Given, "P"("P") = 2/5, "P"("Q") = 2/5, "P"("R") = 1/5

and "P"("E"/"P") = 1/2, "P"("E"/"Q") = 1/3,

"P"("E"/"R") = 1/4

Required probability = P(E)

= "P"("P") "P"("E"/"P") + "P"("Q") "P"("E"/"Q") + "P"("R") "P"("E"/"R")

= 2/5 xx 1/2 + 2/5 xx 1/3 + 1/5 xx 1/4

= 1/5 + 2/15 + 1/20

= (12 + 8 + 3)/60

= 23/60

Concept: Baye'S Theorem
Is there an error in this question or solution?

#### APPEARS IN

Balbharati Mathematics and Statistics 1 (Arts and Science) 11th Standard Maharashtra State Board
Chapter 9 Probability
Miscellaneous Exercise 9 | Q II. (14) (a) | Page 214