I think it's the third one too
Answer:
0.375, 0.125, 0.5
Step-by-step explanation:
given that you are taking a T/F exam and you have no idea at all about the answers to the last three questions.
Probability for correct guess = 0.5 remains constant for each of the three questions
X - no of questions is binomial with n =3 and p = 0.5
1) the probability that you guessed right on exactly one of the three questions
= P(X=1)
= ![3C1(0.5)^3 = 0.375](https://tex.z-dn.net/?f=3C1%280.5%29%5E3%20%3D%200.375)
2) the probability that you guessed right on zero of the three questions
= ![P(X=0)\\= 0.5^3=0.125](https://tex.z-dn.net/?f=P%28X%3D0%29%5C%5C%3D%200.5%5E3%3D0.125)
3) the probability that you guessed right on at least two of the questions
=![P(x=3)+P(2)\\= 1-0.5\\=0.5](https://tex.z-dn.net/?f=P%28x%3D3%29%2BP%282%29%5C%5C%3D%201-0.5%5C%5C%3D0.5)
Answer:
yes I agree with kevin's thinking because she needs 75 for each of the 12 days so its 12*75 and compare with how she earns 85 dollars each month for ten months which is 85 *10
Step-by-step explanation:
Answer: yes.
Step-by-step explanation: