TS ICET 24 May 2018 Shift 1 Paper

Question : 149 of 200

Marks: +1, -0

A baa contains 4 white. 5 red and 7 black balls. Three balls are drawn one after the other without replacement. The probability they are all red is?

Solution:

Total outcomes

= 16×15 ×14

Favourable outcomes

= 5× 4×3

∴ Required probability

=\;{5 × 4 × 3}/{16 × 15 × 14}=\;{1}/{56}

Go to Question:

Prev Question

Next Question