Problem: In an exam, 90% of the students passed in Maths and 85% passed in English. if 225students got pass mark in \both subject and no student failed in \both subjects. how manystudents were there in the class?
View all: ISLAMI BANK(AB) | WRITTEN QUESTION (MATH) SOLVE | 1995
Correct Answer: ans. 300 student
Explanation:
একটি পরীক্ষায় 90% student গণিতে এবং 85% student ইংরেজীতে পাশ করল । যদি 225 জন ছাত্র পাশ করে এবং কেউই যদি উভয় বিষয়ে ফেল না করে তবে এ শ্রেণীতে student কত?
Students failed only in maths = (100 — 90) %=10%
Students failed only in English = (100 – 85)%=15%
Students failed in Maths and English =(10 + 15)=25%
So, Students passed in both subjects = %(100-25)=75%
When 75 students got pass marks then total student were=100
When 225 students got pass marks then total student were =$\frac{100\times 225}{75}$=300
