Online Test — Probability
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
medium
A fair coin is tossed once. The probability of getting a tail is:
0
1/2
1
1/4
Explanation: Total outcomes=2, favorable=1 → 1/2
Question 2 of 10
medium
A die is rolled once. The probability of getting a number greater than 4 is:
1/6
1/3
1/2
2/3
Explanation: Favorable: {5,6} → n(E)=2, n(S)=6 → 2/6=1/3
Question 3 of 10
medium
The probability of an impossible event is:
0
1
0.5
Cannot be determined
Explanation: Impossible events have probability 0
Question 4 of 10
medium
One card is drawn from a deck of 52 cards. The probability of drawing a king is:
1/13
1/52
4/13
1/4
Explanation: 4 kings in 52 cards → 4/52=1/13
Question 5 of 10
medium
A bag has 3 red, 2 blue, and 5 green marbles. P(blue) is:
1/5
2/5
1/10
1/2
Explanation: Total=10, blue=2 → 2/10=1/5
Question 6 of 10
medium
The probability that it will rain tomorrow is 0.35. The probability that it will NOT rain is:
0.35
0.55
0.65
0.75
Explanation: P(not rain) = 1 − 0.35 = 0.65
Question 7 of 10
medium
Two coins are tossed. The probability of getting at least one head is:
1/4
1/2
3/4
1/3
Explanation: S={HH,HT,TH,TT}; favorable=3 → 3/4
Question 8 of 10
medium
A number from 1 to 15 is chosen at random. P(prime) is:
2/5
3/5
7/15
8/15
Explanation: Primes: 2,3,5,7,11,13 → 6 numbers → 6/15=2/5
Question 9 of 10
medium
The probability of selecting a vowel from the letters of the word "PROBABILITY" is:
3/11
4/11
5/11
6/11
Explanation: Vowels: O,A,I,I → 4 vowels, total 11 letters → 4/11
Question 10 of 10
medium
A die is rolled. P(number < 7) is:
0
1/6
1
5/6
Explanation: All outcomes 1-6 are <7 → 6/6=1 (certain event)