Practicing Success
Practicing Success
CUET Preparation Today
The average of a positive number, its square and 3 is 5. Find the number. |
2 3 1 4 |
3 |
Assume the number be n. Square of the number = n2 Average of n, n2 and 3 = (3+n+n2)/3 = 5 3+n+n2 = 15 n2 + n -12 = 0 n2 + 4n - 3n -12 = 0 (n+4)(n-3)=0 The correct answer is Option (2) → 3 |
