RD Sharma Class 7 ex 25.1 Solutions Chapter 25 Data Handling IV (Probability)

In this chapter, we provide RD Sharma Class 7 ex 25.1 Solutions Chapter 25 Handling IV (Probability) for English medium students, Which will very helpful for every student in their exams. Students can download the latest RD Sharma Class 7 ex 25.1 Solutions Chapter 25 Handling IV (Probability) Maths pdf, Now you will get step by step solution to each question.

TextbookNCERT
ClassClass 7
SubjectMaths
ChapterChapter 25
Chapter NameHandling IV (Probability)
ExerciseEx 25.1

RD Sharma Solutions for Class 7 Chapter 25 Data Handling IV (Probability) Ex 25.1 Download PDF

Chapter 25 Data Handling IV (Probability) Exercise – 25.1

Question: 1

A coin is tossed 1000 times with the following frequencies:

Head: 445, Tail: 555

When a coin is tossed at random, what is the probability of getting?

(i). a head?

(ii). a tail?

Solution:

Total number of times a coin is tossed = 1000

Number of times a head comes up = 445

Number of times a tail comes up = 555

Number of times a tail comes up

Question: 2

A die is thrown 100 times and outcomes are noted as given below:

Outcome:123456
Frequency:21914231815

If a die is thrown at random, find the probability of getting a/an:

(i) 3 (ii) 5 (iii) 4 (iv) Even number (v) Odd number (vi) Number less than 3.

Solution:

Total number of trials = 100

Number of times “1” comes up = 21

Number of times “2” comes up = 9

Number of times “3” comes up = 14

Number of times “4” comes up = 23

Number of times “5” comes up = 18

Number of times “6” comes up = 15

Data Handling Probability Part 4

(iv) Frequency of getting an even no. = Frequency of 2 + Frequency of 4 + Frequency of 6 = 9 + 23 + 15 = 47

Probability to getting an even no.

(v) Frequency of getting an odd no. = Frequency of 1 + Frequency of 3 + Frequency of 5 = 21 + 14 + 18 = 53

Chapter 25 Data Handling iv probability exercise 25.1

Question: 3

A box contains two pair of socks of two colours (black and white). I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that I will make a pair?

Solution:

No. of socks in the box = 4

Let B and W denote black and white socks respectively. Then we have:

S = {B,B,W,W}

If a white sock is picked out, then the total no. of socks left in the box = 3

No. of white socks left = 2 – 1 = 1

then the total no. of socks left in the box

Question: 4

Two coins are tossed simultaneously 500 times and the outcomes are noted as given below:

If same pair of coins is tossed at random, find the probability of getting:

(i) Two heads (ii) One head (iii) No head.

Solution:

Number of trials = 500

Number of outcomes of two heads (HH) = 105

Number of outcomes of one head (HT or TH) = 275

Number of outcomes of no head (TT) = 120

Number of outcomes of no head (TT)

All Chapter RD Sharma Solutions For Class 7 MathsI think you got complete solutions for this chapter. If You have any queries regarding this chapter, please comment on the below section our subject teacher will answer you. We tried our best to give complete solutions so you got good

Leave a Comment

Your email address will not be published.