The average of six numbers is 45.5 . If a new number is added then the new average becomes 47. Find the new number?
Answers
Answer:
Answer:
56
Step-by-step explanation:
step 1 :
Represent your six numbers using letters a-f. looking for the average of the six numbers, we have to add up the numbers and then divide it by the number of the values given. i.e
(a+b+c+d+e+f) ÷ 6 which the answer has been given us as 45.5, we then will multiply the number of the values which is 6 by the average given which is 45.5, which will simply give us 273. Then to find the new average, we also have to go through the same method but will have to add one more letter to represent the new number and divide it by the number of values which is 7. i.e (a+b+c+d+e+f+g) ÷ 7 which is 47. Then multiply the average(47) by the number of values(7), which will give us 329. Finally,to look for the number, you have to subtract 273 from 329, that will give us 56 as our final answer.
Step-by-step explanation: