A) 14 years
B) 6 years
C) 15 years
D) 10 years
Correct Answer: D
Solution :
\[{{B}_{1}}+{{B}_{2}}+{{B}_{3}}+{{B}_{4}}=36\] year \[({{B}_{1}}+5)+({{B}_{2}}+5)+({{B}_{3}}+5)+({{B}_{4}}+5)+{{B}_{5}}\] \[=\,\,\,\,15\times 5,\,\,\,{{B}_{5}}+20+36=15\times 5=75\] \[{{B}_{5}}=75-56={{B}_{5}}=\,\underline{\,\mathbf{19}\,\,\mathbf{years}}\]You need to login to perform this action.
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