Advertisements
Advertisements
Question
A die is thrown once. Find the probability of getting a number greater than or equal to 4.
Solution
In throwing a dice, total possible outcomes = {1, 2, 3, 4, 5, 6}
n(S) = 6
On a dice, number greater than or equal to 4 = {4, 5, 6}
n(E) = 3
Probability of getting a number greater than or equal to 4
= `(n(E))/(n(S))`
= `3/6`
= `1/2`
APPEARS IN
RELATED QUESTIONS
A number is chosen at random from the number –3, –2, –1, 0, 1, 2, 3. What will be the probability that square of this number is less then or equal to 1?
A box contains some black balls and 30 white balls. If the probability of drawing a black ball is two-fifths of a white ball; find the number of black balls in the box.
Two coins are tossed once. Find the probability of getting
1) 2 heads
2) at least 1 tail.
In a race between Mahesh and John, the probability that John will lose the race is 0.54. Find the probability of:
- winning of Mahesh
- winning of John
A dice is thrown once. Find the probability of getting a number greater than 6.
Two dice are rolled together. Find the probability of getting a total of at least 10.
Two dice are rolled together. Find the probability of getting a multiple of 2 on one die and an odd number on the other die.
All the three face cards of spades are removed from a well-shuffled pack of 52 cards. A card is then drawn at random from the remaining pack. Find the probability of getting a black card.
Two different coins are tossed simultaneously .Find the probability of getting :
(i)two tails
An unbiased cubic die is thrown .Find the probability of getting (i) an odd number,