Conditional probability from a two-way table

Maths

Higher Probability (Conditional and Further Set Notation)

Find the difference between the students in year 7 and the students in year 8 for each club in the table.

Insert a final column and a final row and the add up the total for each column and for each row.

The two-way table shows information about year 7 and 8 students and their participation in some school clubs. How do you find the total number of students?

The two-way table shows information about year 7 and 8 students and their participation in some school clubs. What is the probability that two students picked at random attend debate club?

The two-way table shows information about year 7 and 8 students and their participation in some school clubs. What is the probability that two students picked at random attend chess club and one is in year 7 and the other in year 8?

There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. If you want to calculate the probability that both are green, what calculation should you do?

There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get one of each colour.

There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get at least one blue.

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