engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 Quantitative Aptitude Ratio and Proportion Simple Ratios
A bag contains white and black balls. The ratio of the white and black balls is 4 ∶ 7. If the number of black balls is 280, then find the number of white balls in the bag.
1
120
2
80
3
160
4
200