+0

# plz help confused but cant get them righty

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https://vle.mathswatch.co.uk/images/questions/question17709.png

https://vle.mathswatch.co.uk/images/questions/question16708.png

https://vle.mathswatch.co.uk/images/questions/question15992.png

May 2, 2020

#1
+111433
+1

First one

M    :     W     :    C

17          9         12

Let  the number of women  =  x

So.....the  number of men  = x + 3512

And we know that

W             9

___  =    ____

M             17

So this implies that

9             x

__  =  ________        cross-multiply

17      x + 3512

9 ( x + 3512) = 17x     simplify

9x + 31608  = 17 x        subtract  9x from both sides

31608  =  8x       divide both sides by 8

3951  = x  = the number of women

We also know  that

C           12         4

___  =    ___  =  __

W            9         3

So  multiplying both sides of this  by W  we have that

C  = (4/3)W

C = (4/3)3951   = 5268  =   number of children

May 2, 2020
#2
+111433
+1

Second one.....this one is a little  difficult  !!!

Note  that  the ratio of 2  to 7   is the same as   6 to 21

So the ratio of blue to green  =  6 : 21

And  red : green  =  1 : 3   =    7 : 21

So.....we have the following possibilities

B      R      G          Total

6      7       21          34

12   14      42          68

24   28      84        136

So....the greatest number of red sweets possible   =   24

May 2, 2020
#3
+111433
+1

Last one

Circle : Stalls

2   :    5

5/2  = S/C

(5/2)C  =  S

So  the  number that can possiblt occupy S  = (5/2)(528)  = 1320

But only 2/3 of these showed up  = 880

So  the %   of  occupancy  =    [ 528 + 880 ]  / [528 + 1320]   = 1408 / 1848  = .76  = 76%

May 2, 2020