The average age of the mother and her six children is 10 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother?  Choose the correct choice from the following answers:
A) 40
B) 41
C) 42
D) 43
E) 44
Total age of mother and 6 children = avg x n = 10 x (6+1)= 70   If mother is excluded new average is  (10 - 5)= 
<gadget id="calculator"> (10 - 5)</gadget>
<output>5</output>
5   so for 6 children= 6 x 5 =30   so mother's age is  70 - 30= 
<gadget id="calculator"> 70 - 30</gadget>
<output>40</output>
40   40nswer: Option 40
<result>A</result>
The average age of the mother and her six children is 10 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother?