Answer:
1 / 16
Step-by-step explanation:
Number of options = 4
Number of correct answers = 1
Number points gained for a correct answer = 1
Number of points lost for an incorrect answer = 1/4 = 0.25
Probability of choosing a correct option = 1/4
Probability of choosing an incorrect option = 3/4
x ____ 1 ______ - 1/4
P(x) __ 1/4 ______ 3/4
Expected gain or loss :
E(x) = Σx*p(x)
E(x) = (1 * 1/4) + (-1/4 * 3/4)
E(x) = 1/4 - 3/16
E(x) = (4 - 3) / 16
E(x) = 1 /16
A gain of 1/16
Hi I would like to help you but please attach a photo thank you
Answer:
A= 81πm² or 254.47 m²
Step-by-step explanation:
Area = π x r²
π x 9m² (9x9)
<em>i'm not 100% sure this is correct so i'm sorry if it is wrong</em>
Answer: 4 miles per hour
Step-by-step explanation: Just divide 12 by 3 .-.
