mean of 5 numbers is 25 and the four numbers are 16,26,20,32 find the fifth number
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Answered by
1
5th number = 31
Step-by-step explanation:
mean = sum of observation/number of observations
mean =25
number of observation = 5
25= sum of observation / 5
sum of observation= 25*5
sum of 5 observation= 125
given 4 numbers =16,26,20,32
sum of 4 numbers = 16+26+20+32= 94
difference b/w
(sum of 5 observation - sum of 4 observation)
= 5th number
= 125-94
= 31
verification sum of 5 observation= 16+26+20+32+31
= 125
mean = 125/5
= 25
verified
Answered by
2
Answer:
16+26+20+32+x/5=25
94+x=25×5
94+x=125
x=125-94
x=31
Therefore, Fifth number is 31
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