Question

If the mean of 20, 18, 13, 12, k and 10 is 15, find the value of k​

Answer 1

Answer

k=17

Step-by-step explanation:

20+18+13+12+k+10/6=15

73+k/6=15

73+k=15*6

k=90-73

k=17

Answer 2

Answer:

• 17

Step-by-step explanation:

Given

• Mean of 20 , 18 , 13 , 12 , k , 10 is 15

To find

• k

Solution

Mean = Sum of all observations / total number of observations

• 15 = 20 + 18 + 13 + 12 + k + 10 / 6

• 15 × 6 = 20 + 18 + 13 + 12 + k + 10

• 90 = 73 + k

• k = 90 - 73

• k = 17

∴ Value of k is 17.

Verification

Mean = Sum of all observations / total number of observations

• 15 = 20 + 18 + 13 + 12 + 17 +10 / 6
• 15 = 90 / 6
• 15 = 15
• L.H.S = R.H.S