Two different families $A$ and $B$  are blessed with equal number of children. There are $3$ tickets to be distributed amongst the children of these families so that no child gets more than one ticket . If the probability that all the tickets go to the children of the family $B$ is $\frac {1}{12}$ , then the number of children in each family is?

  • [JEE MAIN 2018]
  • A

    $4$

  • B

    $6$

  • C

    $3$

  • D

    $5$

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