The mean of 25 observations is 36. out of these observations if the mean of first 14 observations is 32 and that the last 13 observations is 40.what is the 13th observation ?
plz answer thus by step by step plz.
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Answer:
The 13th observation is 36
Step-by-step explanation:
Given:
The mean of 25 observation is 36
Solution:
mean value of 25 observation= 36
Sum of 25 observation= 36*25=900
mean value of first 13 observation= 32
Sum of first 13 observation= 32*13=416
mean value of last 13 observation= 40
Sum of last 13 observation= 40*13=520
sum of 25 observation=Sum of first 13 observation + Sum of last 13 observation + 13th observation
900=416+520+13th observation
900=936+13th observation
13th observation= 936-900
13th observation= 36
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