Q.1: Two coins are tossed simultaneously 1000 times and the following outcomes are recorded.

Outcome

Two Tails

One Tail

No Tail

Frequency

560

280

160

What is the probability of the occurrence of: i) two tails ii) one tail iii) no tail ?

Q.2: A box contains 15 blue balls, 20 red balls and 12 yellow balls. If any random ball is picked from the box, what is the probability of getting a red ball, yellow ball or blue ball ?

Q.3: A dice is thrown 1000 times with the frequencies for the outcomes 1,2,3,4,5 and 6 as shown in the following table:

Outcome

1

2

3

4

5

6

Frequency

160

174

110

240

246

70

Q.4: While tossing two coins simultaneously for 500 times, we get two heads 275 times. Find the probability of not two heads.

Q.5: A box contains 50 discs numbered 1 to 50. If one disc is drawn at random, then find the probability that it bears, i) a prime number ii) a multiple of 6 iii) an odd number.

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Your worksheets must have come in really useful for home schooling all over the world. They are hard though!

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Thank you !

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