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1. The some of daily income of P, Q and R is TK.90. If Q earns TK.10 more than P and R earns double of what Q earns, then what is the average of daily income of P and Q?
- A. 15
- B. 15
- C. 15
- D. 15
Answer: Option B
Explanation:
P+Q+R = 90 tk
Q = 10+P
R = 2Q = 2(10+P) = 20+2P
P+Q+R = 90
P+10+P+20+2P = 90
P = 15
So, Q = 10+P = 10+15 = 25
Now, P+Q = 15+25 = 40
Average of P and Q is = 40/2 = 20 (Ans)
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