There are 28 boys and 25 girls in a school hall. After y girls leave the hall, the I probability of selecting a girl at random becomes ?. Find the value of y. 3 7

For what values of b will f(x)= logbx be a decreasing function? (16 )

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?