Question

the mean of 15 number is 12 and the mean if other 45 numbe is 14.find the mean of 60 numbers taken together​

Answer 1

Answer:15

Step-by-step explanation:

Mean of 15no. Is 12

45no.ka 14hai then 60no. Ka15 hoga

Answer 2

Answer:

Step-by-step explanation:

Let the 15 numbers be a1,a2,a3,.....,a15

Given (a1+a2+a3+.........+a15)/15=12

=)a1+a2+a3+..........+a15=180

Let the 45 numbers be b1,b2,b3,..........,b45.

Given,(b1+b2+b3+...........+b45)/45=14

b1+b2+b3+...........+b45=630

(a1+a2+a3+..........a15+b1+b2+b3+........+b45)/60

=(180+630)/60=810/60=81/6=27/2=13.5

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