Question

Two digits number are formed using digit 0,1,2,3,4,5 without repeation a digit.​

Answer 1

The sample space is

S={10,12,13,14,15,20,21,23,24,25,30,31,32,34,35,40,41,42,43,45,50,51,52,53,54}

∴n(S)=25

Now U is event that the number so formed is divisible by 5.

∴U={10,15,20,25,30,35,40,45,50}

∴n(U)=9

Answer 2

Answer:

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