Mr Brown gives his class a test. The 15 girls in the class get a mean mark of 75%
The 20 boys in the class get a mean mark of 60%
Nick says that because the mean of 75 and 60 is 67.5 then the mean mark for the whole
class in the test is 67.5%
Nick is not correct.
Is the correct mean mark less than or greater than 67.5%?
You must justify your answer.

8y^50

step-by-step explanation:

the answer is 375 miles

step-by-step explanation:

yes   because as the functions are graphed they eventually will intersect unless otherwise

step-by-step explanation:

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720