There are 30 students in a year 10 maths class. in the latest test the 21 girls in the class score a mean of 61%. in the same test the 9 boys in the class scored a mean of 78%. calculate the mean for the whole group of students.

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: