how to solved it upper questions as show in picture
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Answer:
1/6! = 6*5*4*3*2*1 = 1/720
1/7! = 7*6*5*4*3*2*1 = 1/5040
x/8! = 8*7*6*5*4*3*2*1 = x/40320
1/720+1/5040 = x/40320
5040+720 whole divided by 3628800 = x/40320
x = 5760*40320 whole divided by 3628800
x = 232243200/3628800
x = 64
option (B)
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