There are 4 numbers N1, N2, N3 and N4. Average of N1, N2 and N3 is 30. Average of N2, N3 and N4 is 26. Value of N1 is 28. What is the value of N4?
Show answer & explanation
Correct answer: B
Explanation
Given:
Average of N₁, N₂, N₃ = 30
Average of N₂, N₃, N₄ = 26
N₁ = 28
According to the formula:
Average = (Sum of numbers) / Count
N₁ + N₂ + N₃ = 30 × 3 = 90
28 + N₂ + N₃ = 90
N₂ + N₃ = 62
N₂ + N₃ + N₄ = 26 × 3 = 78
62 + N₄ = 78
N₄ = 16