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Shower-cleaner liquid is sold in spray bottles. The volume of liquid in a bottle may be modelled by a normal distribution with mean 955 ml and a standard deviation of 5 ml. Determine the probability that the volume in a particular bottle is:

a) at most 960 ml

Let X be the volume of liquid in a particular bottle, then we want to find P(X <= 960). We first need to transform from X to Z (to the standard normal distrib...

Answered by Sarah S. • Maths tutor

6435 Views

A gym has 275 members. 40% are bronze members. 28% are silver members. The rest are gold members. Work out the number of gold members.

Firstly, we can calculate the total percentage of gold members = Total - bronze - silver

Therefore, %gold = 100% - 40% - 28% = 32%

So we know that 32% of 275 members are gol...

Answered by Sarah S. • Maths tutor

9954 Views

What is the difference between a receptor and an effector in the nervous system?

A receptor detects the stimuli and converts it into an impulse and an effector converts the impulse into an action. An example of a receptor is a light receptor in the eye which detects changes in light i...

Answered by Sundas B. • Biology tutor

87380 Views

How does present perfect work?

Present perfect is the most commonly used past tense in German. It consists of an auxiliary verb and the past participle of the main verb. The auxiliary verb is usually haben conjugated in the pr...

Answered by Emma B. • German tutor

1642 Views