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There are only red , blue and purple counters in a bag. The ratio of the number of red counters to the number of blue counters is 3 : 17. If a counter is taken randomly the probability that it is purple is 0.2 Work out the probability for it to be red.

I would first take into account all the variables - there are red, blue and purple counters, we know the ratio of red to blue and we know the probability of purple is 0.2. As I know the probability that purp...
GW
Answered by George W. • Maths tutor
18077 Views

Describe how water, ions and sugar are obtained and transported through plants.

Water Water is obtained from the soil into the roots of the plant. This occurs via osmosis , which is the movement of high water potential to low water potential [alternatively, from an area of low to high c...
OH
Answered by Olivia H. • Biology tutor
8549 Views

The curve C is given by the equation x^4 + x^2y + y^2 = 13. Find the value of dy/dx at the point (-1,3). (A-level)

The most important thing to note about this question is that we must differentiate implicitly. We must differentiate each term with respect to x. Using our differentiation rules we can see that our first ter...
RK
4252 Views

How many atoms are there in 0.75 mol of water? Give answer to 2 decimal places

Number of particles of water = avogadro constant x amount in molTherefore6.02 x10 23 x 0.75= 4.515 x10 23 There are 3 atoms in every molecule of water so we need to multiply the number of particles by 34.515...
AR
Answered by Alicia R. • Chemistry tutor
4654 Views

What is the significance of the number e (Euler's number)?

The irrational number e is one of the most important numbers in mathematics. The value of it is 2.718... but since it is irrational that is e to 4 significant figure, only. How can we calculate this number? ...
SA
Answered by Soleiman A. • Maths tutor
5864 Views