Rs Aggarwal 2019 Solutions for Class 7 Math Chapter 23 Probability are provided here with simple step-by-step explanations. These solutions for Probability are extremely popular among Class 7 students for Math Probability Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rs Aggarwal 2019 Book of Class 7 Math Chapter 23 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Rs Aggarwal 2019 Solutions. All Rs Aggarwal 2019 Solutions for class Class 7 Math are prepared by experts and are 100% accurate.

Page No 283:

Question 1:

A coin is tossed 300 times and we get head : 136 times and tail : 164 times.
When a coin is tossed at random, What is the probability of getting (i) a head, (ii) a tail?

Answer:

Total number of trials = 300
Number of times a head is obtained = 136
Number of times a tail is obtained= 164

(i) Probability of getting head =Number of times heads is obtainedTotal number of trials=136300=3475

(ii) Probability of getting a tail =Number of times tails is obtainedTotal number of trials=164300=4175

Page No 283:

Question 2:

Two coins are tossed simultaneously 200 times and we get two heads: 58 times, one head: 83 times: 0 head: 59 times.
When two coins are tossed at random, what is the probability of getting (i) 2 heads, (ii) 1 head, (iii) 0 head?

Answer:

Total number of trials = 200
Number of times 2 heads are obtained = 58
Number of times one head is obtained  = 83
Number of times no head is obtained = 59

(i) Probability of getting 2 heads =  Number of times 2 heads have been obtainedTotal number of trials  = 58200=29100


(ii) Probability of getting 1 head = Number of times 1 head has been obtainedTotal number of trials  = 83200


(iii) Probability of getting 0 head =  Number of times head has not been obtainedTotal number of trials  = 59200

Page No 283:

Question 3:

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

Outcome 1 2 3 4 5 6
Frequency 21 14 18 15 23 9

When a dice is thrown at random, what is the probability of getting a (i) 3, (ii) 6, (iii) 6, (iv) 1?

Answer:

Total number of trials = 100
Number of times 3 is obtained = 18
Number of times 6 is obtained = 9
Number of times 4 is obtained = 15
Number of times 1 is obtained =  21

(i) Probability of getting a 3=Number of times 3 is obtainedTotal number of trials =18100=950(ii) Probability of getting a 6=Number of times 6 is obtainedTotal number of trials =9100(iii) Probability of getting a 4=Number of times 4 is obtainedTotal number of trials =15100=320(iv) Probability of getting a 1=Number of times 1 is obtainedTotal number of trials =21100

Page No 283:

Question 4:

In a survey of 100 ladies it was found that 36 like coffee while 64 dislike it.
Out of these ladies, one is chosen at random. What is the probability that the chosen lady (i) likes coffee, (ii) dislikes coffee?

Answer:

Total number of ladies surveyed = 100
Ladies who like coffee = 36
Ladies who do not like coffee = 64

(i) Probability of choosing a lady who likes coffee=Number of ladies who like coffeeTotal number of ladies =36100=925(ii) Probability of choosing a lady who dislikes coffee=Number of ladies who dislike coffeeTotal number of ladies =64100=1625



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