Question

Sol: ( N_{0} cdot sigma_{0} ) stations arailable ( =15 ) no. of stations at which trainstropped =
: No. of ways that the train can stop at s stations out of is is -
[
15 mathrm{c}=frac{15 !}{5 !(15-5) !}=frac{151}{51 times 101}=sqrt[3]{3+28 k}
]
( tan (cos x)(3) )
( downarrow )
[
frac{18 times 14 times 13 times 12^{3} times 11}{8 times 4 times 3 times 2}
]
( =21 times 143=3003 ) ths

# There is 15 stations between A and B. Train stopped only five stations between A and B, in how many ways tramm stopped it none of the stations are consecutive ?

Solution