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Example 2 Ten coins are tossed simultaneously. Find the probability of getting P(X = x) = nCx px qn-x. , x = 0 , 1, 2 , ..., n i) Probability of getting atleast seven heads P(x >7) = P (x = 7) + P(x = 8) + P (x = 9) + P (x =10) ii) Probability of getting exactly 7 heads iii) Probability of getting almost 7 heads P( x < 7) = 1 – P(x > 7) = 1 symbol{ P(x = 8) + P (x = 9) + P(x = 10)} |
Last modified: Tuesday, 20 March 2012, 4:16 PM