Question

N is a 3-digit number that is a multiple of 7, what is the probability that it will be a multiple of 5? N एक 3-अंकीय संख्या है जो 7 का गुणक है, क्या संभावना है कि यह 5 का गुणक होगा?

Answer 1

Step-by-step explanation:

3-digit no.multiple of 5=

105,115,125,135,145,155,165,175,185,195,

205,215,225,235,245,255,265,275,285,295,

305,315,325,335,345,355,365,375,385,395,

405,415,425,435,445,455,465,475,485,495,

505,515,525,535,545,555,565,575,585,595,

605,615,625,635,645,655,665,675,685,695,

705,715,725,735,745,755,765,775,785,795,

805,815,825,835,845,855,865,875,885,895,

905,915,925,935,945,955,965,975,985,995

No.of digits=90

3-digit no.mutiple of 5 and 7 =

105,175,245,315,385,455,525,595,665,735,805, 875,945

No.of digits=13

Probability that 3-digit no. is multiple of both 3 and 7 =. 13/90=0.14

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