احتمال أن يكون 44142717 رقماً لهاتف مكون من 8 أرقام هي 4,7,1,1,4,2,4,7 يساوي 11680
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Given : Probability of 8 digit ph one number 44142717 from digits 4,7,1,1,4,2,4,7 is 1/1680
To Find : TRUE or FALSE.
Solution:
4,7,1,1,4,2,4,7
Total Digits = 8
4 repeated 3 times
7 repeated 2 times
2 repeated 2 times
So total possible number = 8! / 3! . 2! . 2 !
= 1,680
44142717 can be formed in1 wat only
Hence probability of selecting 44142717 is 1/1680
Hence given statement is TRUE.
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