Average mark in Math in a class of 40 students is 45. Average mark of all the 30 boys is 50. Then the average mark obtained by the girls is :
ক) 30
খ) 35
গ) 25
ঘ) 40
Related Questions
ক) Decreased by 9%
খ) Increased by 9%
গ) Decreased by 18%
ঘ) Increased by 16%
ক) যৌগিক
খ) মিশ্র
গ) জটিল
ঘ) সরল
জব সলুশন
