You have $80 and your sister has $150. You are saving $7 per week and your sister is saving $4 per week. How long will it be bef
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Answer:
0.6517
Step-by-step explanation:
Given that in a certain game of chance, your chances of winning are 0.3.
We know that each game is independent of the other and hence probability of winning any game = 0.3 (constant)
Also there are only two outcomes
Let X be the number of games you win when you play 4 times
Then X is binomial with p = 0.3 and n =4
Required probability
= Probability that you win at most once
=
We have as per binomial theorem
P(X=r) =
Using the above the required prob
= 0.6517