Solution
The direct method to solve the questions for non-negative integral solution is finding the value of
$$n+r-1_{C_{r-1}}$$Here, n= 14 r=3
Substituting the values, we get $$\ 16_{C_2}$$which is 120.
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The direct method to solve the questions for non-negative integral solution is finding the value of
$$n+r-1_{C_{r-1}}$$Here, n= 14 r=3
Substituting the values, we get $$\ 16_{C_2}$$which is 120.
