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N sweets in a bag. 6 sweets are orange. The rest are yellow. Hannah takes a random sweet from the bag and eats it. She then takes another random sweet from the bag & eats it. The probability Hannah eats 2 orange sweets is 1/3. Show n^2 - n - 90 = 0.

It's a probability equation. The probability of getting an orange sweet the first time is 6/n. The probability of getting an orange sweet the second time is 5/n-1Times those together to get the probabilit...

Answered by Hannah B. • Maths tutor

3851 Views

How is food absorbed into the blood?

Food is masticated and broken down, to increase its surface area, in the mouth. Particularly, starch is broken down by the enzyme amylase. An enzyme is a biological catalyst that has an active site and is...

Answered by • Biology tutor

3899 Views

How does a mass spectrometer work?

Mass spec is used alongside many analytical techniques, and provides information of the structural formula of a molecule such as proteins. Initially the sample is vapourised and then ionised by bombarding...

Answered by • Chemistry tutor

2017 Views

What is the role of ADH in water homeostasis?

Homeostasis is maintaing the body's internal environment. Antidiuretic Hormone (ADH) is synthesised in the hypothalamus and secreted by the pituitary gland in response to low water in the body. It acts on...

Answered by Jemimah A. • Biology tutor

10044 Views

Does the criminal law leave too much to the jury when it comes to the issue of dishonesty?

Dishonesty is an essential element of the property offences including fraud and theft. The jury will be directed by the judge to consider whether reasonable people would consider the conduct of the defen...

Answered by • Law tutor

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