Astudent answers a multiple choice exam question that has 4 possible answers. suppose that the probability that the student knows the answer to the question is 0.80 and the probability that the student guesses (doesn’t know the answer) is 0.20. if the student knows the answer, the probability of choosing the correct answer is 1 (because the student knows the answer). if the student guesses, the probability of choosing the correct answer is 0.25. a) what is the probability that the student really knew the correct answer? (that is, what is the probability that the student knew the answer, given that the student got the answer correct). b) suppose there is a third option. the student knew the answer with probability of .7, the student guessed with probability .2, and the student(incorrectly) thought they knew the answer given that the student thought they knew it is 0. the conditional probability of a student getting the correct answer given that they guessed is still .25. using this information, calculate the probability that the student really knew the correct answer.

i dont know the answer but here's a picture of a dog

this is a good question! i’ll do some research and what i find, i’ll contact you asap when i have something! ✊

fabric (square meters)                   cloaks

7                                                           21

4/3                                                         4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is   square meter. now we will multiply   by 4 to find fabric needed for 4 cloaks.