Three coins are tossed. Find the probability that no more than one coin lands heads up.

Three coins are tossed. Find the probability that no more than one coin lands heads up.

There are 3 ways where only 1 head will show: htt, tht, tth and there is 1 way where no heads will show: ttt. There are 3 ways where 2 heads will show: hht, thh, hth and finally, there is 1 way where only heads wil show: hhh).
So, there are 4 ways out of 8 that no more than 1 head shows. The probability is 4/8 = 1/2 = 50%.

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