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The total price of 20 mobiles of brand 1 and 5 mobiles of brand 2 is Rs. 390000 and the total price of 30 mobiles of brand 2 and 5 brand 1 mobiles is Rs. 615000. The price of a mobile of brand 2 is how much percent more than the price of a mobile of brand 1?

The total price of 20 mobiles of brand 1 and 5 mobiles of brand 2 is Rs. 390000 and the total price of 30 mobiles of brand 2 and 5 brand 1 mobiles is Rs. 615000. The price of a mobile of brand 2 is how much percent more than the price of a mobile of brand 1? Correct Answer 20%

Let the price of brand 1 mobile and brand 2 mobile be Rs. M and Rs. N respectively.

Given,

⇒ 20M + 5N = 390000

⇒ 5M + 30N = 615000

Solving,

⇒ 20M + 120N = 615000 × 4

⇒ 20M + 5N = 390000

Subtracting,

⇒ 115N = 2070000

⇒ N = 18000

⇒ M = (390000 – 5 × 18000)/20

⇒ M = 15000

Required percentage

⇒ 18000 = 15000 + 15000 × ?/100

⇒ ? = 20%

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