Class 10R sat a test the mean mark for the class was 70% there are 30 students in class 10R, 20 are boys the mean mark for the boys is 62% work out the mean for the girls

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)

Tom is buying topsoil for the flower bed shown below. one bag of topsoil covers 15 square meters. how many bags of topsoil does tom need to cover his flower bed?

Which multiples do 3and 5 have in common? write all the common multiples of 3 and 5