Question

1.) A Jar contains three red marbles and four blue marbles. A marble is randomly selected. What is the probability that the marble selected is red?

2.) A letter is randomly selected from the word "YANKEES". What is the probability the letter is not an E?

3.) A pair of dive is tossed. What is the probabitly of getting:
a.) 2 fours

b.) a sum of 6

4.) The probability it will rain is 0.7. What is the probability it will not?

5.) If two coins are tossed, what is the probability of getting two tails?

Answer 1

probs are defined as: (how many we want)/(how many we got)

how many marbles we got?

Answer 2

7

Answer 3

3 is how many we want (red marbles)

7 is better, thats how many marbles we got

so prob of picking red is 3/7

Answer 4

how many letters we got in that word up there?

Answer 5

7

Answer 6

good, and how many are NOT an E ?

Answer 7

5

Answer 8

so out prob of picking NOT an E is?

Answer 9

5/7

Answer 10

good

Answer 11

A pair of dive is tossed. What is the probabitly of getting:

this one can be a little confusing at first; but notice that we have 6 outcomes for the first die; and 6 more for each one of those on the second die;

6*6 = 36 total outcomes , does that make sense?

Answer 12

yeah

Answer 13

set up a grid; 6 across and 6 down