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There are 9 counters in a bag. 7 of the counters are green. 2 of the counters are blue. Two counters are chosen at random, what is the probability one counter of each colour is chosen.

There are two methods to pick one counter of each. Either pick the (1)green counter first and then blue, or a (2)blue counter first and then green. We must calculate the probability of both of these scenario...
UB
Answered by Ummar B. • Maths tutor
29405 Views

How do expressions of time work in Latin?

The way time is expressed in Latin depends on whether you are trying to describe the time when an event occurred, or how long an event occurred for. You should always start by asking yourself: am I answering...
ER
Answered by Ellen R. • Latin tutor
3246 Views

What's the difference between "estar" and "ser"? (Both of them mean "to be")

“ Ser ” is used to describe permanent or long lasting qualities. It is also used to talk about date and time.Hoy es lunes, son las 12.30 = Today is Monday, it’s 12.20Examples:Laura es alta = Laura is tall (t...
SG
Answered by Sofia G. • Spanish tutor
2594 Views

Explain why the number of organisms decreases along the food chain.

Not all energy is transferred between different levels of the food chain due to not all the organisms being consumed, often not the entire organism is eaten either, leaving behind energy in the hair/fur, tee...
JG
Answered by James G. • Biology tutor
14579 Views

What is the First Law of Thermodynamics?

The First Law of Thermodynamics is that energy cannot be created or destroyed, it can only change from one form to another. For example, a boulder perched at the top of a hill has gravitational potential ene...
JD
Answered by Jade D. • Chemistry tutor
2996 Views