exam
Maths Puzzle
Ten coins are tossed simultaneously. In how many of the outcomes will the third coin turn up a head?
A.
210
B.
29
C.
3×28
D.
None of these
Read Solution (Total 1)
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- Total possible outcomes is 2^10
In half the outcomes, the third coin will be tails (in the other half it will be heads).
(2^10)/2 = 2^9
This is also the number of outcomes where the third coin will come up heads. - 10 years agoHelpfull: Yes(0) No(1)
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