Help Math Problems Probabilities

[japjapwarrior13]

There is a multiple choice with 5 choices and 2 of them are correct. When 2 answers are chosen at random, what is the probability that you get both correct answers?
a) 1/25
b) 1/20
c) 1/10
d) 4/25

a) 15
b) 27
c) 30
d) 33
Suppose you are playing a game with a single dice wherein the number of points you score depends on your throw. If the number of spots on the thrown die is any value from 1 to 4, your score becomes the same, that is, 1 to 4. If the number of the spots on the thrown die is 5 or 6, you get no points. What is the expected value of your score when you throw the die once?
a) 5/3
b) 7/3
c) 5/2
d) 20/3

Baka po may makatulong sa akin. Thank you badly needed help lng po Thank you!

 

[kibaPH]

Try lang sa una tanong.

Probability= Favorable outcome/Total outcome

=1/10

Say choices are a,b,c,d,e
Assume Correct answer a,b (1 favorable outcome)

Total outcome,
(a,b), (a,c), (a,d), (a,e),
(b,c), (b,d), (b,e)
(c,d), (c,e)
(d,e)
=10 possible or total outcome