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P and Q together earn Rs. 250 per day. Q and R together earn 220 per day. P, Q, and R when working together earn Rs 350 per day. How much does Q earn daily?

P and Q together earn Rs. 250 per day. Q and R together earn 220 per day. P, Q, and R when working together earn Rs 350 per day. How much does Q earn daily? Correct Answer Rs. 120

Given:

P and Q earns = Rs. 250

Q and R earns = Rs. 220

P, Q, and R together earns 350

Calculation

P + Q = 250     ----(1)

Q + R = 220     ----(2)

Add eq. (1) and eq. (2)

⇒ P + Q + Q + R = 470

⇒ P + Q + R + Q = Rs. 470     ----(3)

P + Q + R = 350     ----(4)

Put value of P, Q, and R from eq. (4) to eq. (3)

⇒ 350 + Q = 470

⇒ Q = Rs. 120

∴ Daily earing of Q is Rs. 120

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