AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

Q.

The frequency distribution of 30 workers' salaries (in Rs.) from a particular factory is shown below:

A worker is randomly selected. The probability that his salary is more than or equal to 150 but less than Rs. 210 is

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

a

215

b

730

c

56

d

815

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

Given a data about the salary of 30 workers.
Question Image

Question Image

We have to find the probability that his salary is more than or equal to 150 but less than Rs. 210.
Total number of workers in a company, n(S) = 30.
The probability of an event A is given by,

P (A) = Number of favourable outcomes T o t a l number of outcomes

Let

C

be the event of getting a worker whose wages more than or equal to 150 but less than 210, then,
n(C) = n (workers with wages 150 – 170)+n(workers with wages 170 – 190) + n(workers with wages 190 – 210)

⇒ n (C) = 5 + 6 + 5 ⇒ n (C) = 16

The probability that the salary is more than or equal to 150 but less than 210 is given by,

P (C) = n (C) n (S) ⇒ P (C) = 1630 ⇒ P (C) = 815

Thus, the probability that his salary is more than or equal to

150

but less than 210 is

815

.
Hence, option 4 is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Related Blogs

Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!

Related Blogs

Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

best study material, now at your finger tips!

live classes
progress tracking
24x7 mentored guidance
study plan analysis

download the app

gplay

mentor

Download the App

gplay

personalised 1:1 online tutoring