Math, asked by sharadcharde12, 11 months ago

the mean of 35 observation is 20,out of which mean of first 18 observation is 15 and mean of last 18 observation is 25. find the 18th observation ​

Answers

Answered by geethalogisa
3

Answer:

20

Step-by-step explanation:

20=sum/35

sum=700

sum+18th observation =720

700+18th observation =720

18th observation =720-700

18th observation =20

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