Ek pratiyogi Pariksha mein Ek prashn ka Sahi Uttar dene per 1 ank Milta Hai jabki Ek prashn ka galat Uttar dene par 1/2 ank Kat liya jata hai Jayanti Ne 120 prashnon ke Uttar dijiye tatha use 90 ank prapt Hue batao Jayanti Ne kitne prashnon ke Sahi Uttar diye the
daughter present age = 14
Salim s present age = 34
total question= 12
Right question= 100
wrong question = 20
let the number of right question is x than wrong will 120-x . so no of mark for right question will 1x and marks for other will (120-x)1/2
so equation will 1x-(120-x)1/2 = 90 . then answer will 100 and 20
I have come now in class 8 . so easy to solve