Answer:
Mean of three number\[=\frac{Sum\text{ }of\text{ }three\text{ }numbers}{3}\] \[10=\frac{Sum\text{ }of\text{ }three\text{ }numbers}{3}\] Hence, sum of three numbers =30 Also. Mean of other four numbers \[=\frac{Sum\text{ }of\text{ }other\text{ }four\text{ }numbers}{4}\] \[12=\frac{Sum\text{ }of\text{ }other\text{ }four\text{ }numbers}{4}\] Hence, sum of other four numbers = 48 Then, Mean of all the numbers \[=\frac{Sum\text{ }of\text{ }all\text{ }the\text{ }numbers}{total\,\,numbers}\] Sum of first three numbers + \[=\frac{Sum\text{ }of\text{ }other\text{ }four\text{ }numbers}{7}\] \[=\frac{30+48}{7}=\frac{78}{7}\]=11.14 Hence, mean of all the number is 11.14.
You need to login to perform this action.
You will be redirected in
3 sec
