Probability
Bayes Theorem
MMTS_Full_Test_21
Grade 12
Question:
A bag contains 4 white and 3 black balls. Another bag contains 3 white and 7 black balls. One ball is drawn from each bag. The probability that both are same colour is
$41/70$
$33/70$
$12/70$
$9/49$
Step-by-Step Solution
Key Concept: P(same) = P(WW) + P(BB)
$P=12/70+21/70=33/70$.
Correct Answer: 2