0
Seven coins are tossed What is the probability of 3 heads or 2 tails?
Wiki User
∙ 12y ago
The probability of one event or the other occurring is the probability of one plus the probability of the other. The probability of getting 3 heads is the probability of 3 heads (1/23) multiplied by the probability of 4 tails (1/24) multiplied by the number of possible ways this could happen. This is 7c3 or 35. Thus the probability of 3 heads is 0.2734375. The probability of 2 tails is the probability of 2 tails (1/22) multiplied by the probability of 5 heads (1/25) multiplied by the number of ways this could happen. That is 7c5 or 21. Thus the probability of 2 tails is 0.1640625
The probability of one or the other is the sum of their probabilities:
0.1640625 + 0.2734375 = 0.4375
Thus the probability of getting 3 heads or 2 tails is 0.4375.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
The probability that both of two tossed coins will come down heads is?
1 chance in 4
Three fair coins are tossed at the same time What is the probability that one of the coins will show heads and the other two will show tails?
2/9
If four coins are tossed what is the probability of tossing all heads?
The probability is 1/21/21/2*1/2=1/16, or 0.0625 or 6.25%
What is the probability that when a coin is tossed it will land heads up?
50%
When a penny and a nickel are tossed. find the probability that the penny shows heads given that the nickel shows heads?
The probability is 0.5
What is the probability of getting 2 heads when 2 coins are tossed?
The probability of tossing two heads in two coins is 0.25.
What is the probability of seven coins tossed simultaneously and all of them landing on heads?
It is 1/2^7 = 1/128.
If a coin is tossed then what is the probability that the number is 5?
Coins do not have numbers, there is only the probability of heads or tails.
Four coins tossed what is the probability of tossing all heads?
If they are fair coins, it is 1/16.
Two coins are tossed What is the probability of both coins are heads?
The probability that both coins are heads is the probability of one coin landing heads multiplied by the probability of the second coin landing heads: (.5) * (.5) = .25 or (1/2) * (1/2) = 1/4
If n coins are tossed simultaneously what is the probability that they are all show heads?
(0.5)n
The probability that both of two tossed coins will come down heads is?
1 chance in 4
What is the probability that exactly two coins come up heads when four coins are tossed?
6/16 = 3/8
Three fair coins are tossed at the same time What is the probability that one of the coins will show heads and the other two will show tails?
2/9
If four coins are tossed what is the probability of tossing all heads?
The probability is 1/21/21/2*1/2=1/16, or 0.0625 or 6.25%
What is the probability that when a coin is tossed it will land heads up?
50%
What is the probability that a coin tossed in the land with heads up?
It is 0.5
