Math, asked by taev, 1 year ago

find the mean of 30 numbers given mean of 10 of them is 12 and the mean of remaining 20 is 9

Answers

Answered by atulrajcool

2

(10×12+20×9)/30=(120+180)/30=10

atulrajcool: if you have any doubt follow me and message me and don't forget to mark my answers brainlist if you understand it well

taev: is this a formula or something

taev: if it is, please let me know

atulrajcool: i have only applied the basic formula

atulrajcool: sum of observation/number of observation

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