Advertisements
Advertisements
प्रश्न
If three coins are tossed simultaneously, then the probability of getting at least two heads, is
पर्याय
\[\frac{1}{4}\]
\[\frac{3}{8}\]
\[\frac{1}{2}\]
\[\frac{1}{4}\]
उत्तर
GIVEN: Three coins are tossed simultaneously.
TO FIND: Probability of getting at least two head.
When three coins are tossed then the outcome will be
TTT, THT, TTH, THH. HTT, HHT, HTH, HHH
Hence total number of outcome is 8.
At least two heads means that, THH, HHT, HTH and HHH are favorable events
Hence total number of favorable outcome is 4
`"We know that PROBABILITY" = "Number of favourable event"/"Total event number of event"`
Hence probability of getting at least two head when three coins are tossed simultaneously is equal to `4/8=1/2`
APPEARS IN
संबंधित प्रश्न
A die is thrown, then find the probability of the following events:
A is an Event: getting an odd number on the top upper surface of the die.
B is an Event: getting a perfect square on the upper surface of the die.
Three different coins are tossed together. Find the probability of getting exactly two heads.
A bag contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that the number on the drawn card is:
(i) divisible by 3 or 5
(ii) a perfect square number
Find the class mark of the class 35 - 39.
A piggy bank contains hundred 50 paise coins, fifity ₹1 coins, twenty ₹2 coins and ten ₹5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, find the probability that the coin which fell will be a ₹1 or ₹2 coin
A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the card thoroughly. Find the probability that the number on the drawn card is an odd number
Cards numbered from 11 to 60 are kept in a box. If a card is drawn at random from the box, find the probability that the number on the drawn card is a perfect square number
All jacks, queens and kings are removed from a pack of 52 cards. The remaining cards are well-shuffled and then a card is randomly drawn from it. Find the probability that this card is a red card.
In a bag there are 44 identical cards with figure of circle or square on them. There are 24 circles, of which 9 are blue and rest are green and 20 squares of which 11 are blue and rest are green. One card is drawn from the bag at random. Find the probability that it has the figure of
It is known that a box of 200 electric bulbs contains 16 defective bulbs. One bulb is taken out at random from the box. What is the probability that the bulb drawn is non-defective.
A card is drawn at random from a well-shuffled pack of 52 cards. Find the probability of getting a red king,
A game consists of tossing a one-rupee coin three times, and noting its outcome each time. Find the probability of getting three heads.
In a hockey team there are 6 defenders, 4 offenders and 1 goalee. Out of these, one player is to be selected randomly as a captain. Find the probability of the selection that – A defender will be selected.
In a single throw of a die, find the probability of getting a number
(i) greater than 2
(ii) less than or equal to 2
(iii) not greater than 2.
Two coins are tossed together. What is the probability of getting:
(i) at least one head
(ii) both heads or both tails.
A die is thrown once. Find the probability of getting:
a number other than 3 and 5
A manufacturer tested 7000 LED lights at random and found that 25 of them were defective. If a LED light is selected at random, what is the probability that the selected LED light is a defective one
A diece is tossed two times. The number of possible outcomes is ______.
In a throw of a dice, the probability of getting an even number is the same as that of getting an odd number.
Three coins are tossed simultaneously. What is the probability of getting exactly two tails?
