Multiple choice

Score obtained by students in a particular test is 25, 35, 30, 15, X. If the average score of the class is 30, then find the value of K in the equation X + 5 = 50 K.

  1. K = 2/5

  2. K = - 4/5

  3. K = 19/10

  4. K = 1

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(105 + X)/ 5 = 30, X = 4545 + 5 = 50 K, K = 1