TSI Math: How Many Times Will Jaqen Roll Two 10s?
Jaqen has two 10-sided dice. He rolls both at the same time. What is the probability that both faces add up to a number less than 20?
| Data Analysis, Statistics, and Probability | Probabilistic Reasoning |
| Mathematics and Statistics Assessment | Probabilistic Reasoning |
| Product Type | TSI |
| TSI | Mathematics and Statistics Assessment TSI Math TSI Mathematics |
| TSI Math | Data Analysis, Statistics, and Probability |
| TSI Mathematics | Data Analysis, Statistics, and Probability |
| Test Prep | TSI |
Transcript
combination of faces adds up to a number less than
twenty much faster to find the probability of rolling two
tens and find the probability of all the other possible
roles so just take the shortcut there Well the probability
of rolling ten on one dies one in ten because
each of the ten faces has an equal probability of
turning up The probability of rolling to tens then is
one over ten times one over ten or one over
one hundred or one percent The probability of rolling anything
other than two tens and a rowing to faces that
add up to a number less than twenty is one
minus the probability of that one hundred shot So it's
ninety nine out of one hundred probability that both faces
add up to a number less than twenty is ninety
nine out of one hundred And yeah we like those
odds So the answer is c and we're so shmoop