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A box contains 7 caramel doughnuts. They have masses of 56 g, 67 g, 45 g, 56 g, 58 g, 49 g and 50 g. Find the median, mean and mode values of these masses. Bonus: What mass of doughnut could be added to the box to make the mean mass = 61 g.

Median: Order the values from lowest to highest: 45, 49, 50, 56, 56, 58, 67. Pick the middle value. Answer = 56 g.Mode: The most common value. Answer = 56 g.Mean: Add all the values up, then divide the resul...
KG
Answered by Kate G. • Maths tutor
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Explain the trends in first ionisation energy in the second period in the periodic table.

This question is designed to test a students knowledge of electronic configuration in elements, and their ability to use this knowledge to assign a reasoning to the trend given. The general trend is an incre...
FO
Answered by Fergus O. • Chemistry tutor
3302 Views

√5( √8 +√18) can be written in the form a√10 where a is an integer.

First, I would take into account the important parts of the question. I'm looking for an answer in the form of "a√10, where a is an integer". I would explain if not known that an integer is just a ...
GW
Answered by George W. • Maths tutor
5614 Views

There are only red , blue and purple counters in a bag. The ratio of the number of red counters to the number of blue counters is 3 : 17. If a counter is taken randomly the probability that it is purple is 0.2 Work out the probability for it to be red.

I would first take into account all the variables - there are red, blue and purple counters, we know the ratio of red to blue and we know the probability of purple is 0.2. As I know the probability that purp...
GW
Answered by George W. • Maths tutor
18080 Views

Describe how water, ions and sugar are obtained and transported through plants.

Water Water is obtained from the soil into the roots of the plant. This occurs via osmosis , which is the movement of high water potential to low water potential [alternatively, from an area of low to high c...
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Answered by Olivia H. • Biology tutor
8551 Views