Incoming students to a certain school take a mathematics placement exam. the possible scores are 1, 2, 3, and 4. from past experience, the school knows that if a particular student's score is x {1,2,3,4}, then the student will become a mathematics major with probability x-1/x+3 suppose that the incoming class had the following scores: 10% of the students scored a 1, 20% scored a 2, 60% scored a 3, and 10% scored a 4. what is the probability that a randomly selected student from the incoming class will become a mathematics major? express your answer as a fraction in lowest terms. suppose a randomly selected student from the incoming class turns out to be a mathematics major. what is the probability that she scored a 4 on the placement exam? express your answer as a fraction in lowest terms.

The probability that a Randomly selected student from the incoming class will become a mathematics major is or 0.2829

The probability that she scored a 4 on the placement exam is

Step-by-step explanation:

Consider the provided information.

Then, the given student score is:

10% of the students scored a 1 = 10% = 10/100=1/10

20% of the students scored a 2 = 20% = 20/100=2/10

60% of the students scored a 3 = 60% = 60/100=6/10

10% of the students scored a 4 = 10% = 10/100=1/10

The student will become a mathematics major with probability x-1/x+3.

Calculate the probability for x=1,2,3 and 4

Let the event  M  denote that a randomly selected student will become a math major.

Part (A)

Now calculate the probability that a Randomly selected student from the incoming class will become a mathematics major.

Hence, the probability that a Randomly selected student from the incoming class will become a mathematics major is or 0.2829

Part (B)

What is the probability that she scored a 4 on the placement exam?

Hence, the probability that she scored a 4 on the placement exam is

c

step-by-step explanation:

answer: the answer is one

step-by-step explanation:

pemdas, in this situation there is no parenthesis or exponents so you go to multiplication, 1x1=1, then division 1/1= 1 then addition 1+1=2 then subtraction 2-1=1