Question
Number of integral solutions of the equation $x_{1}+x_{2}$ $+x_{3}=25$ where $5 \leq x_{i} \leq 10, i=1,2,3$ is(A) 12(B) 21(C) 18(D) 81
Step 1
We can substitute $x_{i}$ with values from 5 to 10 and find the number of ways to get the sum as 25. Show more…
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