Answer:
E(F)=200
V(F)=100
Step-by-step explanation:
(a) Let F be the amount he spends on falafel sandwiches over the next 400 days. Find E[F] and V(F).
If we analized his expenses in falafel sandwiches, we know he buys a $1 sandwich with aprobability of 50%.
If we call the random variable D the daily expense in falafel sandwiches, it is a Bernoulli variable with p=0.50.
If F is the sum of the daily expenses D during the 400 days, then we can say it is a binomial variable with p=0.5 and n=400.
Then we can calculate the expected value of F as:
The variance of F is then
Answer:
Step-by-step explanation:
common factor of 2a² and 10ab= 2a
Answer:
5 to 1.
Step-by-step explanation:
1 m= 100 cm
25 m= 2500 cm
2500 to 500... divided 100 -->
25 to 5... divided by 5 -->
5 to 1
Answer:
1 oz of pure gold = $1,320
Step-by-step explanation:
Divide $2640 with 2 to get the price per unit rate.
2640/2 = 1320
$1,320 is your price per unit.
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If Brittany is starting at the origin and the destination is (6,3), Brittany should move 6 units to the right then 3 units up. This is location where she should plot the point.