Top answers


What is a Probability Mass Function (PMF)?

A Probability Mass Function is a function used to describe the liklihood of the outcome of a random event that has a finite number of possible outcomes. The domain is the range of possible outcomes of the ra...
DT
Answered by Deleted T. • Maths tutor
7003 Views

Chaacteristics of living things

Living things differ from non-living things based on certain characteristics. There are 7 characteristics that identify living things and these can be remembered with the acronym MRS GREN. Movement Respirati...
BU
Answered by Bubaraye U. • Biology tutor
3300 Views

Please factorise fully: 2a^2 + 6a

We are factorising 2a 2 +6a. When we factorise an expression, we look for common terms that we can place outside of a bracket. Another way of thinking about this is something that both 2a 2 and 6a can be div...
MP
Answered by Monika P. • Maths tutor
13012 Views

Expand and simplify (x+6)(x-6)

The first step is to expand the expression. This can be done using the FOIL method. This means that we multiply the First, Outside, Inside and Last terms in the bracket.First: x . x = x 2 Outside: x . -6 = -...
MP
Answered by Monika P. • Maths tutor
29133 Views

How can I distinguish between feminine and masculine nouns?

In French, there are two categories of nouns, feminine and masculine. Most students find it difficult to distinguish between them, as there are many exceptions to the rules and the genders of some nouns seem...
CD
Answered by Corina D. • French tutor
10243 Views