Question

can u answer my question ASAP because it's urgent but i want it to be step back step plz

Answer 1

Answer:

9.67

Step-by-step explanation:

Mean (average) of 5 = 12

Mean (average) of 7 = 8

So, Total will be

= (5*12) + (7*8) = 116

Therefore, Mean (average) of 12 = 116/12 =9.67

Answer 2

Answer:

9.666

Step-by-step explanation:

let take 12 variables so

(x1+x2+x3+x4+x5)/5=12

so (x1+x2+x3+x4+x5)=12*5=60

so  (x1+x2+x3+x4+x5)=60

same like that next seven no. from x6 to x12

x6+....x12=8*7=56

so x1+x2+.....x11+x12=56+60=116

now divide by 12

116/12=9.66666