Question 111

The average weight of 89 notebooks in a box is 8.9 kg. When a new notebook is added, its average is 9 kilograms. Find the weight of the new notebook. (In kg)

Solution

Share

Average weight of 89 Notebooks in a box = 8.9 kg

=> Total weight = $$89\times8.9=792.1$$ kg

Let weight of new book = $$x$$ kg

=> New average = $$\frac{792.1+x}{90}=9$$

=> $$792.1+x=90\times9=810$$

=> $$x=810-792.1=17.9$$ kg

=> Ans - (C)

Get AI Help

View More Questions From Quant

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free

Free SSC Topicwise Questions

SSC Data InterpretationSSC GeometrySSC Linear EquationsSSC Number SystemsSSC Quadratic EquationsSSC TrigonometrySSC AgesSSC ArithmeticSSC Reading ComprehensionSSC VocabularySSC AnalogySSC Coding DecodingSSC DirectionsSSC Meaningful OrderSSC Number SeriesSSC PuzzlesSSC SyllogismsSSC Words FormationSSC Venn Diagram

Book Free CAT Mentorship

Get personalized CAT strategy from a 99%iler

500+ students mentored
CAT mentor

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now
Ask AI