$\begin{array}{1 1} 1296 \\ 671 \\ 625 \\ 585 \end{array}$

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No. of ways in which any number appearing in one dice = 6

No. of ways in which 2 appear in one dice = 1

No. of ways in which 2 does not appear in one dice = 5

There are 4 dice.

Getting 2 in atleast one dice =

Getting any number in all the 4 dice - Getting not 2 in any of the 4 dice.

$=(6\times 6\times 6\times 6)-(5\times 5\times \times 5\times 5)$

$1296-625=671$

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