There are 10 boys and 20 girls in a class. The class has a test.

The mean mark for all the class is 60.
The mean mark for the girls is 54.

Work out the mean mark for the boys.

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)

Find the average rate of change for the given function drom x=1 to x=2

Is ofat (-25, 0), (25, 0) co- (0, -15), (0, 15)?