Edexcel GCSE MODULAR 5MB1H Higher Tier UNIT 1 Answers March 2012

was this a calc paper or non calc?

was this a calc paper or non calc?

what grade student are you?

does anyone else think that this paper was harder than the other ones, like the Nov 2011 one, because the grade boundaries for the nov 2011 were 53 for an A*, so if this was harder than the grade boundary should be lower than that

I thought I would have got an A, but after looking at this I think i probably got a high B Oh well

Mrmanps

Your answer for question 11c is incorrect, as he doesnt just use the men aged 17-30, he uses 50 people in total only 4 of which are male and between 17-30.

A correct answer would be:

a) He only asks people in his restaurant so bias.
b) He only asks people on one evening depending on the evening he could have got different clientel so bias.
c) he only asks in the evening not during the day a lot of restaurants are open for lunch so excluding lunch time visitors would also be bias.

Other than that i got the exact same answers as you apart from the gradient where i got -0.36 but i took a triangle from 30-40 seconds and it is clearly 3.6 litres when you take the triangle up to the line p.

I think it was one of the hardest tests edexcel have given since the sample material came out so hopefully for my students the pass mark will be lower.

One other question mrmanps how have you managed to get a mark scheme already? results plus dont have it and edexcel wont release it yet, you dont happen to work for edexcel do you?

Yes you can do it either way and i would think that you should get 2 marks for that working and loose a mark for missing one of the probabilities out, you would get at least 1 mark anyway.

You can do it like this
P(LLL)+p(LLD)+p(LDL)+p(LDD)+p(DLL)+p(DLD)+p(DDL)+p(DDD) then take you answer away from 1. or you can work out all the probabilities that allow eric to win at least 1 game, but the modle answer at the start of the thread is by far the quickest way to do it.

What did you do for the last question.

Hi just to re cap on the very last question. I managed to get 783/1000. Heres what i have done:

Instead of finding the probability of finding Eric winning at least once (which will take ages!!), i decided to find the probability of him not winning at all.

We have clarified that Isobel probablity of winning one game is 0.6, so the probabilty of her winning all 3 games is 0.6 cubed (AND rule). This results in the fraction 27/125 (0.6 x 0.6 x 0.6=27/125).

We have also clarified that the probability of a draw taking place equals to 0.1 so the probabilty of drawing all 3 games is 0.1 cubed (AND rule). This results in the fraction 1/1000 (0.1 x 0.1 x 0.1=1/1000).

We will add these fractions up to give us 217/1000

We will find the inverse fraction which is 1000 - 217= 783

So 783/1000

Please tell me if i am right or wrong!!! Thank You

It seems to a bit strange.probability of eric winning once in 0.3 not 0.6

Mrmanps

Your answer for question 11c is incorrect, as he doesnt just use the men aged 17-30, he uses 50 people in total only 4 of which are male and between 17-30.

A correct answer would be:

a) He only asks people in his restaurant so bias.
b) He only asks people on one evening depending on the evening he could have got different clientel so bias.
c) he only asks in the evening not during the day a lot of restaurants are open for lunch so excluding lunch time visitors would also be bias.

Other than that i got the exact same answers as you apart from the gradient where i got -0.36 but i took a triangle from 30-40 seconds and it is clearly 3.6 litres when you take the triangle up to the line p.

I think it was one of the hardest tests edexcel have given since the sample material came out so hopefully for my students the pass mark will be lower.

One other question mrmanps how have you managed to get a mark scheme already? results plus dont have it and edexcel wont release it yet, you dont happen to work for edexcel do you?

It seems to a bit strange.probability of eric winning once in 0.3 not 0.6