9 Class Probability

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1The probability of each event, when a coin is tossed for 1000 times with frequencies: Head:455 & Tail: 545 is:

• 0.455 and 0.545
• b. 0.5 & 0.5
• c. 0.45 & 0.55
• d. 455 & 545

2.The sum of all probabilities equal

• 4
• b. 1
• c. 3
• d. 2

3.The probability of each event lies between

• a. 1 & 2
• b. 1 & 10
• c. 0 & 1
• d. 0 & 5

4.If P(E) = 0.44, then P(not E) will be:

• a. 0.44
• b. 0.55
• c. 0.50
• d. 0.56

5.If P(E) = 0.38, then probability of event E, not occurring is:

• a. 0.62
• b. 0.38
• c. 0.48
• d. 1

6.The probability of drawing an ace card from a deck of cards is:

• a. 1/52
• b. 1/26
• c. 4/13
• d. 1/13

7If the probability of an event to happen is 0.3 and the probability of the event not happening is:

• a. 0.7
• b. 0.6
• c. 0.5
• d. None of the above

8.A dice is thrown. The probability of getting 1 and 5 is:

• a. ⅙
• b. ⅔
• c. ⅓
• d. ½

9.A batsman hits boundaries for 6 times out of 30 balls. Find the probability that he did not hit the boundaries.

• a. ⅕
• b. ⅖
• c. ⅗
• d. ⅘