An unbiased coin is tossed 15 times. in how many ways can the coin land tails either exactly 8 times orexactly 5 times?

Probability to get tails exactly 8 times or exactly 5 times is 0.29

Step-by-step explanation:

No of ways the coins lands tails exactly 8 times

P(8) = 15C8 × ×

No of ways the coin lands tails exactly 5 times

P(5) = 15C5 × ×

Probability to get tails exactly 8 times or 5 times

P(8)+P(5) =  15C8 × + 15C5 ×

P = (  15C8 + 15C5 )

P = ( (    ) + ( ) )

P = ( 6435 + 3003 )

P = ( 9438)

P = ( 4719)

P =  

P = 0.29

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step-by-step explanation: