Multiple choice

The average monthly salary per head of the entire staff of a school is Rs. 3000. The average salary per head of 5 senior teachers is Rs. 3700 & that of the junior teachers is Rs. 2300. Find the number of junior teachers in the school.

  1. 4

  2. 5

  3. 3

  4. 2

  5. 7
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

(If x be the number of junior teachers, then, 5 X 3700 + x X 2300 = (5 + x) X 3000= 18500 + 2300x = 15000 + 3000x = 700x = 3500 or x = 5)

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