The average of 10 numbers is 14.8. If two numbers 5 and 23 are replaced by 13 and 26 respectively, then what is the new average?
Answer & explanation
Correct answer: option 1
Total sum of 10 numbers = 10 × 14.8 = 148
Difference by replacing numbers = ( 13 + 26 ) - ( 5 + 23 ) = 11
Increment in average = \(\frac{11}{10}\) = 1.1
New average = 14.8 + 1.1 = 15.9