Answer:
I think it's D
Step-by-step explanation:
Answer:
Step-by-step explanation:
22.75
1.09g 1lb 1000 mL 3.78L
-------- • --------- • ----------- • --------- = 9.083 lbs/gal
1ml 453.592 g 1 L 1 gal
Answer:
The mean of X is 2
Step-by-step explanation:
Given the data in the question;
set of 10 cards consist of 5 red card and 5 blacks
cards are chosen, replaced and shuffled four times;
number of independent trials n = 4
now, since its is replaced, the probability of getting a red card in each trial will be;
p = 5/10 = 0.5
let X rep the number of red cards observed in the four trials.
the random variable follows binomial distribution where
n = 4 and p = 0.5
so
E(X) = ∑xP( X = x )
E(X) = np
we substitute
E(X) = 4 × 0.5
E(X) = 2
Therefore, The mean of X is 2