问题描述:
平均每小时有3个电话打入,问一个小时有5个电话打入的概率.
还给老师了 T
打入的电话都是随机和独立的,对已任意的一个小时,有5个电话打入的概率~
原题:a sales company receives,on average,three calls per hour on its toll-free number.these calls occur randomly and independtly.for any given hour,find the probability that it will revceive exactly five calls.
还给老师了 T
打入的电话都是随机和独立的,对已任意的一个小时,有5个电话打入的概率~
原题:a sales company receives,on average,three calls per hour on its toll-free number.these calls occur randomly and independtly.for any given hour,find the probability that it will revceive exactly five calls.
问题解答:
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