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What is the multiplication rule in probability?

If presented with an 'AND' statement, multiply the probabilites of each individual event happening by one another,If rolling a die, what is the probability of landing a 1 AND then a 21/6 * 1/6 therefore p...

Answered by Nidhish J. • Maths tutor

4357 Views

Rearrange aq - ac = d

Start by factoring out the common term, so in this case a.

a(q - c) = d

Now divide by a on both sides to isolate the (q - c)

(q - c) = d/a

Now ad...

Answered by Avnish S. • Maths tutor

5015 Views

A circle C with centre at the point (2, –1) passes through the point A at (4, –5).....

(a) Find an equation for the circle C.

Before tackling a question like this it is always a good idea to draw a rough sketch of all the information that's given to you.

Answered by Brodie W. • Maths tutor

18178 Views

Express 3 cos θ + 4 sin θ in the form R cos(θ – α), where R and α are constants, R > 0 and 0 < α < 90°.

To find the value of R, use Pythagoras's Theorem using the coeffecients of cos θ and sin θ. The correct answer should be R=5. Expand the expression R cos(θ – α). Equate the expanded expression with 3 cos...

Answered by Anahita G. • Maths tutor

23357 Views

The cost of 5 calculators is £35. Work out the cost of 8 of these calculators.

If the cost of 5 calculators is equal to £35, then we can use division to figure out how much one calculator costs. If we divide 35 by 5 we get the number 7. This means that one of the calculators is g...

Answered by Danielle S. • Maths tutor

4528 Views