Basically subtract 59 from 709 which is 650 , halve 650 which is 325 and then add 59 to the other 325 that u have to add to the first 325 to make 650 so
709-59= 650
650\2= 325
325 + 59= 384
So 384 cheeseburgers were sold and 325 hamburgers
384+325= 709
Answer:
54
Step-by-step explanation:
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ
Answer:
n=8
Step-by-step explanation:

Answer:
Step-by-step explanation:
Let X denote the first step
Let Y denote the second step
Then
E(X) = 0.2
E (Y) = 0.3
V (X) = 0.04
V (Y) = 0.09
Now,
E(X,Y) = E[X] + E{Y}
0.2 + 0.3 = 0.5
And since X and Y are independent
Therefore,
V(X , Y) = V(X) + V(Y)
= 0.04 + 0.09
= 0.13
Now required probability is

= Φ(-1.24)
= 1 - Φ (1.24)
= 1 - 0.8925
= 0.1075