Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A cube painted red on all sides, is cut into 125 equal small cubes. A small cube when picked up is found to show red colour on one of its faces. Then the probability that two more faces also show red colour.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
This problem is of conditional probability. Total cases in which at least one of the cubes is red painted is
125 – 27 = 98 out of which 8 are painted on three sides ⇒ probability = 
= 
.
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