A) 32
B) 60
C) 64
D) 4
Correct Answer: B
Solution :
For \[n>4\] the possible numbers of elements \[=2\,\left[ n_{1}^{2}+n_{2}^{2}+n_{3}^{2}+n_{4}^{2} \right]\] \[=2[{{(1)}^{2}}+{{(2)}^{2}}+{{(3)}^{2}}+{{(4)}^{2}}]\] \[=2([1+4+9+16]=60\]You need to login to perform this action.
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