Question

q 8 and 9 only answer if u know​

Answer 1

8.let us do this by option verification

we know that the children should be in whole numbers

for ex: we can't have 4.5 children in total as 0.5 child is not possible (LOL)

(but it would be great to have 0.5 child....LOL)

ok so for the first option

we know that

mean=sum of children/number of families

x=sum of all the children/total number of children

1=x/5

x=5

so A is possible

for B

1.2=x/5

x=6

so B is also possible

for C

1.3=x/5

x=6.5

(see we found the 0.5 child...LOL)

as we know that 0.5 isn't possible so C is wrong

therefore our answer is C

9.let the circumference of circle be 18

so distance between tom and laura=9

let speed of laura be 8

therefore speed of tom is 9/8*8=9

relative velocity of tom with respect to laura=1

time=distance/speed

=9/1

=9

therefore our answer is C

(Sometimes assuming values makes the problem a lot more easier)