Multiple choice

The ratio of the price of a mobile and a speaker is5 : 2. The average price of two mobiles and a speakeris Rs. 20000. The total sum of the price of a mobileand a speaker is -

  1. Rs. 25000

  2. Rs. 35000

  3. Rs. 30000

  4. Rs. 45000

  5. Rs. 40000
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let mobile price = 5x and speaker price = 2x. Average of 2 mobiles and 1 speaker = (5x + 5x + 2x) / 3 = 20000. 12x / 3 = 20000, so 4x = 20000, x = 5000. Sum of one mobile and one speaker = 5x + 2x = 7x = 7 * 5000 = 35000.

AI explanation

Let the price of one mobile and one speaker be 5x and 2x. The average price of two mobiles and one speaker is (10x + 2x) / 3 = 20000, which simplifies to 12x = 60000 and x = 5000. The total sum of the price of a mobile and a speaker is 5x + 2x = 7x, which equals 7 multiplied by 5000. The total sum is Rs. 35000.

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