The Student Room Group

Math help

http://imgur.com/xciFXWd

Please can someone answer and explain this throughly as i found it on YouTube but the guy isn’t explaining it well and I cannot understand it so can someone help me ASAP
Reply 1
Bump
6A9110D7-1504-46E4-8957-00CDEB932D17.jpg.jpeg here’s part a
6762757C-B717-46D2-8324-9129C767A6D6.jpg.jpeg here’s part b
Reply 4
Original post by Howie_2114
6A9110D7-1504-46E4-8957-00CDEB932D17.jpg.jpeg here’s part a


Wouldn’t the tree diagram be like this instead? http://imgur.com/x1QYzDH
Notice my highlighting
Original post by Muzeah
Wouldn’t the tree diagram be like this instead? http://imgur.com/x1QYzDH
Notice my highlighting

Yeah that is 9/10 on my one as well its just scribbled badly

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