Answer :
Here are the steps:
Number of adults=4(Mother,Father,Raghav and his twin brother)
Number of children under 12 years of age=2(his two sisters)
Thus,
total charge=(9*4)+(4*2)
=36+8
=44
Hope it helped!
Since father and mother are adults'
fee for father and mother = 2×9 = Rs. 18
raghav and his brother are both 14 years old. They are more than 12. So
fee for raghav and his brother = 2×9 = Rs. 18
Both his sisters are less than 12,
fee for his sisters = 2×4 = Rs. 8
Total charge = 18+18+8 = Rs.44
fee for father and mother = 2×9 = Rs. 18
raghav and his brother are both 14 years old. They are more than 12. So
fee for raghav and his brother = 2×9 = Rs. 18
Both his sisters are less than 12,
fee for his sisters = 2×4 = Rs. 8
Total charge = 18+18+8 = Rs.44