Theo earns £20 one weekend.
Theo gives £6 to his mum.
Express £6 as a percentage of £20

30%

Step-by-step explanation:

To find a percentage of a number, take the part of the number and divide it by the whole, then multiply by 100%.

In this case:

6 / 20 = 0.3

0.3 * 100% = 30%

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

c.) 38 blocks

mark brainliest   : )