Top answers

There are 11 pens in a box, 8 are black, 3 are red. Two pens are taken out at random without replacement. What is the probability the pens are the same colour?

For the pens to be the same colour either two black pens need to be selected OR two red pens. So start with the probability of two black pens BB: On the first selection the probability of taking a black pen ...
GI
Answered by Georgia I. • Maths tutor
6788 Views

b)You are given g(x) = ax + b; You are also given that g(0) = 4 and g(1) = - 6; Find the value of a and the value of b

(Question on topic of algebra taken from June 2016 OCR Past Paper)b) This question may look different to the previous one but it's still only algebra, so it;s pretty much the same. Don't let the unknows scar...
SR
Answered by Stefania R. • Maths tutor
4619 Views

a)Rearrange the folowing to make m the subject; 4(m-2) = t(5m+3)

(Question on topic of algebra taken from June 2016 OCR Past Paper)a) This question LOOKS like algerba and IS 100% algebra. We have 2 unknows that we treat just like we treat any number and we have to make m ...
SR
Answered by Stefania R. • Maths tutor
4528 Views

If e^(4t) = 6, find an expression for t.

This question involves rearranging equations. In this case we need to get t on the LHS (left hand side) of this equation in order to find an expression for t . An expression for t just means, what does t equ...
CF
Answered by Catriona F. • Maths tutor
2285 Views

Prove that f(x) the inverse function of g(x) where f(x)= - 3x–6 and g(x)= - x/3–2

f ( x ) and g ( x ) are inverse functions when the following equations are true: f ( g ( x ))= x g ( f ( x ))= x To find ( f(g )( x) ) or ( g(f ( x )), use the inner function as the input for the outer funct...
SK
Answered by Sheela K. • Maths tutor
3792 Views