A small liberal arts college in the Northeast has 150 freshmen. Forty-five of the freshmen are education majors. Suppose twenty freshmen are randomly selected (without replacement). Step 1 of 2 : Find the expected number of education majors in the sample. Round your answer to two decimal places, if necessary.

Step 2 of 2: Find the standard deviation of the number of education majors in the sample. Round your answer to two decimal places, if necessary.

answer: i believe it’s 245.04

step-by-step explanation:

answer:

a=9

step-by-step explanation: lmk if you need a explanation

a

step-by-step explanation:

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west