Geometric or Binomial

Alma wrote a phone app. She has noticed that 3% of the users who download her app upgrade it the same day. Let N be the number of customers who download Alma's app until one upgrades it on the same day. Assume that the probability of each user's upgrades are independent.What type of variable is N?

• Geometric

• Binomial

• Both

• Neither

What’s the probability that the fifth chip you test is the first bad one you find?

• Binomial Distribution

• Geometric Distribution

About 8% of males are colorblind. A researcher needs some colorblind subjects for an experiment and begins checking potential subjects. 

What’s the probability that the first colorblind man found will be the sixth person checked?

• Binomial Distribution

• Geometric Distribution

A set of 20 cards consists of 10 purple cards and 10 green cards.  If you randomly pick a card after shuffling them and replace the card each time and wait until you get your first purple, what distribution is it

• binomial

• geometric

• neither

• normal distribution

If we want to calculate the probability of rolling a 6 for the first time on the 6^th roll of a die, would we use the geometric or the binomial distribution?

• geometric

• binomial

If you want to know how many trials you will need before your first success, use the ????? model.

• Geometric

• Binomial

• Normal

• Calculator

Multiply: (x + 7)(x + 9)

Mathematical Equivalence

ON

When rolling a fair die 100 times, what is the probability of rolling a "4" exactly 25 times? Is this an example of binomial or geometric?

• binomial

• geometric

If you want a certain number of successes in a set amount of trials, use the ????? model.

• geometric

• binomial

• normal

• calculato

counts the number of trials needed to obtain the 1st success. X = 1,2,3,…

• Geometric

• Binomial

• Both

• Neither