The average weight of 9 mangoes increases by 20 g if one of them weighing 120 g is replaced by another. The weight of the new mango is :

a. 180 g
b. 200 g
c. 260 g
d. 300 g

• let the average of 9 mango is x
  then total weight of 9 mango is 9x
  now , according to qtn....9x-120 + y(weight of new mango) = (x+20)9
  by solving this eqn...... y=300 g
• 8 years agoHelpfull: Yes(4) No(0)
• Short cut :
  120+9*20
  =300
• 6 years agoHelpfull: Yes(1) No(0)