IBPS RRB PO (30 June 2024)

Since number of students in the school remains same in all the years.

Hence, average of percent of number of boys who got scholarship in the school in all the five years = (40% + 45% + 35% + 20% + 25%)/5

= 165%/5

= 33%

Total students in the school in 2020 = 180

Total students in the school who got scholarship in 2020 = 75% of 180

= 135

Number of girls in the school who got scholarship in 2016 = 72

Total number of students in the school in 2016 = 72 × (100/30)

= 240

Total students in the school in 2019 = 250

Number of boys who got scholarship in 2019 = 20% of 250 = 50

Number of girls who got scholarship in 2019 = 60% of 250 = 150

Required difference = 150 - 50

= 100

Production of scooters in company A in 2015

= 2800

Production of scooters in company A in 2017

= 3500

Therefore, percentage = ((3500 - 2800)/2800) × 100 = 25%

Average sale of scooters per company for companies A and B in 2016 = (2400 + 2100)/2

= 2250

And the average sale of scooters per year for company B in 2015 and 2018 = (850 + 1200)/2

= 1025

Therefore, difference = 2250 - 1025 = 1225

Production of scooters in company B in 2016

= 6100 - 3300 = 2800

Number of scooters that remain unsold in company B in 2016 = 2800 - 2100 = 700

Therefore, percentage = (700/2800) × 100 = 25%

In 2019:

Production of scooters in company A = (100 + 5)% of 2400 = 2520

Sale of scooters in company A = (100 + 15)% of 1600 = 1840

Therefore, number of scooters that remain unsold in company A = 2520 - 1840 = 680