Question

Joey had 40 words to study for a spelling quiz, but he only learned 10 of them. His teacher surprised the class by telling them that the quiz would only have 1 of those 40 words on it. If the teacher chose that 1 word randomly, what is the probability that it was one of the words Joey learned

Answer 1

O.15

Explanation:

Trust me I tried the other guy got it wrong and this is right

Answer 2

The probability of choosing a word randomly which is one of the words Joey learned = 1/4

Explanation:

Total number of words to be memorized = 40 words

The number of words memorized by Joey = 10

Let E: Event of randomly choosing a word that Joey has learned.

P(E) =
`\frac{\textrm{The total words learned by Joey}}{\textrm{Total Words in the quiz}}`

`\implies P(E) = (10)/(40) = (1)/(4)`

Hence, the probability of choosing a word randomly which is one of the words Joey learned = 1/4