probability question........20 marks
2006-12-05 5:03 am
4 phone calls to 4 friends. The probability of success to call 1 friend is 95% and fail to call is 5%. So what is the probability for "AT LEAST ONE WOULD BE FAILED TO CALL"? Please provide steps, thanks....
回答 (3)
2006-12-05 5:26 am
✔ 最佳答案
FINd THE probability for "AT LEAST ONE WOULD BE FAILED TO CALL" = 1- THE probability for all are success to phone
= 1 - 95% x 95% x 95% x 95%
= 0.185 ( CORR TO 3 SIGNIFICANT FIG )
2006-12-05 5:11 am
form幾的問題?
有冇答案?
有冇答案?
2006-12-05 5:09 am
1-success to call all the four friends
=1-95%X95%X95%X95%
that is the ans.
=1-95%X95%X95%X95%
that is the ans.
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