1.

You play a game with 0.3 as the probability of winning. What is the probability that you win 4 or more games out of 10

Answer»

Let A be an event of winning and B be an event of losing the game.
Given P(A)=0.3
Total PROBABILITY =P(A)+P(B)
⇒ 1=0.3+P(B)
⇒ P(B)=1−0.3=0.7
∴ P(B)=

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