There are 97 girls and 103 boys in Year 11 in a school. Two Year 11 girls and two Year 11 boys are selected to form the student voice
group.
How many different possible selections could be made?​

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

What are the soultion(s) to the quadratic equation 40- x^2=0

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125