The average of P numbers is Q4, the average of Q numbers is P 4. The average of (P+Q) number is?
The average of P numbers is Q4, the average of Q numbers is P 4. The average of (P+Q) number is?
a) QP
b) PQ(P2 + Q2)
c) PQ(P2+Q2-PQ)
d) P2+Q2
Sol:
Sum of P number = PQ⁴
Sum of Q number = QP⁴
(P + Q) = PQ⁴ + QP⁴
