تكفون عندي أسئلة وبي شرح حلها .... جابولي عليها.. وعند طلب ...

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طيب أوكه تكفون حلولي هذه الأسئلة ..........

1. How many different ways can four people: Andy, Betty, Cindy, and Doug, sit in a
row at the cinema if Andy and Betty must sit together?
A) 18
B) 6
C) 12
D) 246

. How many outcomes are there in the sample space if a coin is tossed once and a die

is rolled?
A) 10
B) 4
C) 12
D) 36


. The average repair cost of a microwave oven is 55$, with a standard deviation of 8$.
the costs are normally distributed. If 12 ovens are repaired, find the probability that
the mean of the repair bills will be greater than 60$.
A) 0.0707
B) 0.015
C) 0.1236
D) 0.3707