Answer:
so what is the question
Step-by-step explanation:
pls be more detailed. thank you
Its the last answer (-1+radical 3)/2
You multiply with the opposite so you multiply 1/1+radical 3 with 1- radical 3/1-radical 3 I hope its helpful:)
Using the binomial distribution, it is found that there is a 0.03125 = 3.125% probability that all the nickels will land with heads facing up.
For each coin, there are only two possible outcomes, either it lands on heads, or it lands on tails. The landing of a coin is independent of other coins, hence, the binomial distribution is used to solve this question.
Binomial probability distribution
The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
In this problem:
- 5 nickels, hence
.
- They are equally as likely to land on heads or tails, hence

The probability that all the nickels will land with heads facing up is P(X = 5), hence:


0.03125 = 3.125% probability that all the nickels will land with heads facing up.
A similar problem is given at brainly.com/question/24863377
Answer:
150
Step-by-step explanation:
As the ratio is 5:3 ,
Number of boys / number of girls = 5 / 3
250 / number of girls = 5 / 3
Number of girls = 250 × 3/5
Number of girls = 150