First slide

Combinations

Question

$if three different dies are rolled ,then the number of ways in which the largest of three numbers is not 4 is equal to$

Moderate

Solution

$total number of ways - number of ways when largestnumber is 4$
$= 6 \times 6 \times 6 - (4 \times 4 \times 4 - 3 \times 3 \times 3)$
$= 216 - (64 - 27) = 216 - 37 = 179$

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