Question

Can some one help me with this???

Really need help

Answer 1

Let the complete circle be signified as = 1
Shaded region will be equal to = total - 2 unshared part
= 1 - 1/3 - 3/7
taking LCM
= (21 - 7 - 9)/21
= 5/21

Answer 2

`1-(1)/(3)-(3)/(7)=\\ (21)/(21)-(7)/(21)-(9)/(21)=\\ (5)/(21)`