Question

In a class of 125 students 70 passed in Mathematics, 55 in

Statistics and 30 in both. The probability that a student

selected at random from the class has passed in only one

subject is -

• A. $\frac { 13 } { 25 }$
• B. $\frac { 3 } { 25 }$
• C. $\frac { 17 } { 25 }$
• D. $\frac { 8 } { 25 }$

Answer 1

Answer: (A)

$\frac { 13 } { 25 }$

Answer 2

P (M) + P(Stat) – 2P (M Ē State)

= $\frac { 30 } { 125 }$ = $\frac { 65 } { 125 }$ = $\frac { 13 } { 25 }$