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16-03-2018
Mathematics

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If you toss four coins, what is the probability that you will get exactly 1 or 4 heads? tell whether these events are overlapping or non-overlapping.

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musiclover10045 musiclover10045

16-03-2018

No Heads TTTT = 4C0 = 1
One Heads HTTT = 4C1 = 4
Two Heads TTHH = 4C2 = 6
Three Heads HHHT = 4C3 = 4
Four Heads HHHH = 4C4 = 1

Total chances = 1 + 4+ 6+4 +1 = 16

One head + 4 head = 4 +1 = 5

Total probability = 5/16

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