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Original Probability
Original Probability continued
Vendiagram Questions
Geometric probability
Original Binomial Questions
100

  • What is the probability that you will pick a red card out of two decks of cards? (there are 52 cards in each deck)

52/104= 0.5

100

  • What is the probability that you will flip a coin and land on tails 4 times in a row?

A:1/2^4= 1/16 or 0.0625

100

  1. After surveying 100 people on what kind of drink they like (Coke or Sprite) 30 of them only like sprike, 50 of them only like coke and 20 of them like both. What is the probability that someone drinks sprite?

30/100=.3

100

The goalie saves 45% of the shots he takes on in a game. What is the probability that he saves his 2nd shot?

geometpdf(.45,2)=.2475

100

60% of teens get their permit right when they turn 16.  In a class with 10 students who are all 16, what is the probability that at least 3 of them have gotten their permit?  

1-binomialcdf(10,.6,3)=0.9575

200

30% of students bring  lunch to school rather than buying lunch. What is the probability of a student bringing lunch at a table of eight students?

8x.30= 2.4

200

  • Two coins are tossed, what is the probability that both will land on tails?

25%

200

After surveying 120 students on what brand they like the most (Nike or Adidas) 60 of them said nike, 40 of them said adidas and 20 of them said both. What is the probability that the student likes both of the brands?

  • A:20/120=.1667

200

The probability that a cashier misses scanning an item at his job is 3%, If he is scanning 15 items what's the probability that he doesn't scan his 4th item?

.geometpdf(.3,4) .1029

200

60% of kids in Watertown have decided to go back to school when given the hybrid option.  If a school has 500 students, what is the probability that exactly 300 decide to return.

 binomialpdf(500,.6,300)=0.0364

300

  • There are 100 jelly beans mixed in a bowl. 25 are yellow and 15 are red the rest are green. What is the probability that the jelly bean you pick is green?

 25+15=40. 100-40=60. 60% chance it is green

300

  • Find the probability that the 4 of diamonds is drawn from a deck of cards then right after the queen of hearts is drawn?

 1/52*1/51= 0.000377

300

After surveying 80 students on which is their favorite sport: 9 of them said football, 14 of them said basketball, 20 said soccer, 17 liked basketball and football, 15 liked basketball and soccer, 15 liked Soccer and football, 10 liked all 3.  How many students liked either football, soccer, or basketball. 

43

400

  • A bag contains toy cars numbered 1-10. What is the probability that you select a car with a 3 on it?

 1/10= 0.1 chance

500

  • What is the probability that you don’t roll a 3 or 5 on a dice?  

5/6*5/6= 0.6944