
Hi,
Need help for this qns
Thank you 😊
Hi,
Need help for this qns
Thank you 😊
Simpler method:
76.3 x no. of students = total score
78.1 x no. of students = total score
So try diff numbers, until you get 10
76.3 x 10 = 763
78.1 x 10 = 781
781 – 763 = 18
Since 97 – 79 also = 18, you know that 10 is the correct no. of students
Let then number of children be n
78.1n – 97 = 76.3n – 79
1.8n = 18
n = 10