RRB NTPC 28 April 2016 Paper

Question : 55 of 100

Marks: +1, -0

If a box contains 3 white cushions, 4 red cushions and 5 blue cushions, what is the probability of selecting a white or blue cushion?

Solution:

(1) Total cushions =12No. of white and blue cushions=3 + 5=8
Probability of choosing either blue or white cushion =

8/12 = 2/3

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