Latest Assessment Aptitude Question SOLUTION: There are 15 boys and 10 girls in a class. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?

• Placement Papers
• /
• Assessment
• /
• Category

Assessment Question Papers:

(#M40157820) ASSESSMENT Category question Keep an EYE

There are 15 boys and 10 girls in a class. If three students are selected at random, what is the probability that 1 girl and 2 boys are selected?

Asked In Assessment Samjukta Das (7 years ago)

Unsolved Read Solution (1)

Is this Puzzle helpful?   (0)   (0) Submit Your Solution

Read Solution (1) :

Balaji   (7 years ago)

Let S be the sample space and E be the event of selecting 1 girl and 2 boys.

Then, n(S) = Number ways of selecting 3 students out of 25
= 25C3 `
= (25 x 24 x 23)
(3 x 2 x 1)
= 2300.
n(E) = (10C1 x 15C2)
= 10 x (15 x 14)
(2 x 1)
= 1050.
P(E) = n(E) = 1050 = 21 .
n(S) 2300 46

Is this solution Helpfull? Yes | No   

Please Login to Read Solution.