IBPS RRB PO Mains 25 Sep 2021 Paper

The average age of Prashant, Shivansh, Johny and Vivek is 19 years. If Prashant is 4 years older than Shivansh while Johny is 6 years younger than Shivansh and Vivek’s age is 2 times that of Prashant. Then find the ratio between the ages of Prashant and Vivek.