Correct Answer - Option 3 : Rs 5,000
Given:
Cost of 10 Samsung phones + Cost of 15 Nokia phones = Rs 175000
Cost of 15 Samsung phones + Cost of 10 Nokia phones = Rs 200000
Calculation:
Let Samsung phone be denoted by S and Nokia phone be denoted by N.
10S + 15N = 175000 ---- (1)
15S + 10N = 200000 ---- (2)
Subtracting (1) from (2), we get
5S - 5N = 25000
⇒ S - N = 5000 ---- (3)
Multiplying equation (3) with 10 and adding to (2), we get
25S = 250000
⇒ S = 10000
Putting value of S in equation (3), we get
10000 - N = 5000
⇒ N = 5000
∴ The value of one Nokia phone is Rs 5000