Question

· The average of 11 results is 18, that of the
first 5 is 17 and that of the last 5 is 20. What
is the 6th result ?​

Answer 1

Answer:

13

Step-by-step explanation:

sum of all = 11*18 = 198

sum of first 5 = 5*17= 85

sum of last 5 = 5*20= 100

6th number will be = 198-(100+85)

= 198-185

= 13

Answer 2

Answer:

13

Step-by-step explanation:

average of 11 results = 18

total 11 results = 18 x 11=198

average of first 5 results=17

total of first 5 results= 17 x 5 =85

average of last 5 results=20

portal of last 5 results=20 x 5=100

6th result=198-85= 113

113 - 100=13

= 13