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23 Oct 2007, 09:36
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For one toss of a certain coin, the probability that outcome is heads is 0.6. If this coin is tossed 5 times, which of the following is the probability that outcome will be heads at least 4 times?
(0.6)^5
2(0.6)^4
3(0.6)^4* (0.4)
4(0.6)^4*(0.4)+(0.6)^5
5(0.6)^4*(0.4)+(0.6)^5
(0.6)^5
2(0.6)^4
3(0.6)^4* (0.4)
4(0.6)^4*(0.4)+(0.6)^5
5(0.6)^4*(0.4)+(0.6)^5
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23 Oct 2007, 13:00
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r019h
B.
= (0.6^4) (0.4) + 0.6^5
= (0.6^4) (0.4 + 0.6)
= 0.6^4
23 Oct 2007, 13:02
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r019h
E - 4times H & 1T or 5H = 5X0.6^4 X 0.4 + 0.6^5
