Answer:
765
Step-by-step explanation:
First, find the number of sophomores
3600 * 3/8 =1350
Use the number of sophomores and multiply by 3/5 to find the amount of sophomores opposed to rock climbing
1350 * 3/5 =810
Then subtract the amount of sophomores from the total amount of students
3600 - 1350 =2250
And multiply the remaining students by 9/10 to find the amount of non-sophomores opposed to rock climbing
2250 * 9/10 =2025
Add the amount of sophomores and non-sophomores opposed to rock climbing
810 + 2025 =2835
The amount of students in favor of rock climbing would be
3600 - 2835 =765
Answer:
504 * 0.12 = 60.48
Step-by-step explanation:
math
Answer:
P(X≥75)= 0.22663
Step-by-step explanation:
Hello!
The variable has a normal distribution with mean μ= 67 and a standard deviation δ= 8.
X~N(μ;δ²)
You need to find the probability that a randomly selected X value is at least 75, i.e. 75 or more, symbolically:
P(X≥75)
To calculate this probability is best to work using the standard normal distribution. This distribution is derived from the normal distribution. Considering a random variable X with normal distribution, mean μ and variance δ², the variable Z =(X-μ)/δ ~N(0;1) is determined.
The standard normal distribution is tabulated. Any value of any random variable X with normal distribution can be "converted" by subtracting the variable from its mean and dividing it by its standard deviation.
Using the formula and the values of the parameters of the population you have to standardize the value of X
Z= (X-μ)/δ = (75 - 67)/ 8= 0.75
Now you can express the probability under the standard normal distribution:
P(X≥75) = P(Z≥0.75)
The Z-tables show probability values P(Z≤z₁₋α)= 1 - α, then:
P(Z≥0.75)= 1 - P(Z<0.75)= 1 - 0.77337= 0.22663.
I hope it helps!
Theater: 30
Streaming: 62
DVD: 8
( this information was given in a table but I couldn't do that here)
Please mark brainliest
Answer:
0.1 percent
Step-by-step explanation:
sorry I don't have an explanation. sorry if it's wrong, at least I tried
