CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Tags:

Articles

Discussions
Submit Discussion
Nitish Kumar

· started a discussion

· 1 Months ago

probility (Question:148492.0)

plz explain in details

Question:
There are 350 balls in a box. 80% of them are red balls and the rest of them are black balls. What is the minimum number of balls one should pick to ensure that the ball picked is red.
Options:
A) 281
B) 292
C) 251
D) 71
E) None of these
Solution:

Ans: (d)

Total balls = 350

Number of red balls = 80% of 350 = 280

Number of black balls = 70

To make sure ball is red, minimum number of balls picked = 70 + 1 = 71

-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions