In a math class, 70% of the students have visited the ocean and 55% have visited the mountains on vacation before. If 35% of the students have visited the ocean and the mountains on vacation before, what is the probability that a randomly selected student has visited the ocean or the mountains?

0.9 is the required probability.

Step-by-step explanation:

We are given the following in the question:

Percentage of student that have visited the ocean = 70%

Percentage of student that have visited the Mountains = 55%

Percentage of student that have visited the Oceans and Mountains = 35%

We have to find  the probability that a randomly selected student has visited the ocean or the mountains.

We have to evaluate:

Putting values, we get,

Thus, 0.9 is the probability that a randomly selected student has visited the ocean or the mountains.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b