Advertisements
Advertisements
प्रश्न
A page is selected at random from a book. The probability that the digit at units place of the page number chosen is less than 7 is
पर्याय
`3/10`
`7/10`
`3/9`
`7/9`
उत्तर
`7/10`
Explanation;
Hint:
Here n(S) = 10 ...(given digit at limit place. It has two digit)
n(A) = 7
P(A) = `("n"("A"))/("n"("S")) = 7/10`
APPEARS IN
संबंधित प्रश्न
If A is an event of a random experiment such that `"P"("A"):"P"(bar"A")` = 17 : 15 and n(S) = 640 then find `"P"(bar"A")`
A coin is tossed thrice. What is the probability of getting two consecutive tails?
Two unbiased dice are rolled once. Find the probability of getting the sum as a prime number
Three fair coins are tossed together. Find the probability of getting atleast one tail
In a box there are 20 non-defective and some defective bulbs. If the probability that a bulb selected at random from the box found to be defective is `3/8` then, find the number of defective bulbs
Two customers Priya and Amuthan are visiting a particular shop in the same week (Monday to Saturday). Each is equally likely to visit the shop on any one day as on another day. What is the probability that both will visit the shop on the same day?
In a game, the entry fee is ₹ 150. The game consists of tossing a coin 3 times. Dhana bought a ticket for entry. If one or two heads show, she gets her entry fee back. If she throws 3 heads, she receives double the entry fees. Otherwise, she will lose. Find the probability that she loses the entry fee
Which of the following is incorrect?
The probability a red marble selected at random from a jar containing p red, q blue and r green marbles is
A bag contains 5 white and some black balls. If the probability of drawing a black ball from the bag is twice the probability of drawing a white ball then find the number of black balls.
