Practice Problem 2: Girl or Senior? A local high school has 1400 students; 800 of whom are girls. 300 of the students are seniors; of which 200 are girls. If would choose a girl or a senior? Step 1: List the events. Event A: Choosing student who is a girl + Event B: Choosing a student. + Step 2: Decide if the events are mutually exclusive or not. The events are not mutually exclusive because one student # be a girl and a senior at the same Step 3: Write the correct equation and solve for the probability. The events are not mutually exclusive, so we should use the equation P(A or B) = P(A) + P(B) - P(A and B) = beca How many total students attend the school? 1400 students P(G or S)=P(G) + P(S) - P(G and S) 200 P(G or S) = 800 1400 + 1400 P(G or S) = P(G or S) = The probability of choosing a student who is a girl or a senior is This means that 9 out of ever students is a 14* Check

Create a table that shows all of the possibilities for rolling a dice and flipping a coin.Then list the different possibilities that involve either an odd number or Tails.

Neither Andrew nor David likes to set the table for dinner. They toss a coin to decide who will set the table. David always picks tails. What is the probability David will set the table 3 days in a row? Use a tree diagram to show your work.

There are 2 different fire alarm systems in the store. System A detects fire with a probability of 0.67 and costs 2 times cheaper as system B. System B detects fire with a probability of 0.9. Which option is better: to set one system B or two system A?

If you roll two dice, each with 8 faces,  what sum is most likely to appear from the two dice?   Write out each step and explain what you are doing in each step.

Pablo randomly picks five marbles from a bag of eleven marbles (six red ones, three green ones, and two yellow ones).   How many outcomes are there in the event that all of the marbles he picks are red?

In a suitcase there are 5 orange, y green, (y+2) grey and 6 yellow pens. Probability of choosing one green pen from the given suitcase is 1/3. What is the sum of the number of green, grey and yellow pens?

There are 1000 students in the year level and they have to participate in a certain activity. They can choose from singing, dancing, and acting skills. The X is the number that the students either choose none, one activity, two activities, or all the activities. Find the probability if there are 329 students who participated in 2 activities.

A coin is tossed 3 times. What is the total number of all possible outcomes if there is exactly two heads in a row?