engineering recuitment NPCIL Scientific Assistant Physics Mock Test Quantitative Aptitude Ratio and Proportion Fourth Proportional
There are four classes A, B, C, and D is a school and the total number of students in those classes are x, 48, 72 and 64 respectively. If the student in class D is the fourth proportional of students in A, B, and C, then what is the value of x?
1
60
2
48
3
54
4
42