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Could someone explain this to me??

I have put the question below -
I have two questions
1. In the part circled black on the first number why is it (5/8) ?
2. On the bit underlined black, does anyone know what it says?
Maths.PNG
Original post by noodlestopshop
Maths.PNG

It's the position vector for B.

Another solution can be seen here. http://prntscr.com/xgqi4x

"common"
(edited 3 years ago)
Original post by Plücker
It's the position vector for B.

Another solution can be seen here. http://prntscr.com/xgqi4x

"common"

Ohhhh I see! What does A is common mean?
Original post by noodlestopshop
Ohhhh I see! What does A is common mean?

Common to AB and AE.
Original post by Plücker
Common to AB and AE.

Thankyou, Is there any chance on this question you know where the 11 and 20 comes from?Capture.PNG
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Reply 7
Avatar for R2718
R2718
7
You get 20 from 4 (from A) x 5 (from B) = 20
You 11 from the different possibilities that you can get an odd number on one spinner and an even number on one spinner. This is shown by the ticks in the table drawn.

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