The average sales of Saraswati Motors from January to June are $150 u n i t s$ . Its average sales from July to October are $240 u n i t s$ . What is the average sales (in units) for the months November and December, if the average sales for the year are $200 u n i t s$ ?

180

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240

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220

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270

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Solution

The correct option is B $270$
The average sales of Saraswati motors for year is $200 u n i t s$
$∴$ Total sales of Saraswati motors for year $= 200 \times 12 = 2400 u n i t s$
The average sales of Saraswati motors from January to June are $150 u n i t s$
$∴$ The total sales of motors from January to June $= 150 \times 6 = 900 u n i t s$
The average sales of Saraswati motors from July to October are $240 u n i t s$
$∴$ The total sales of motors from July to October $= 240 \times 4 = 960 u n i t s$
$\Rightarrow$ The total sales of motors from November and December $= 2400 - (900 + 960) = 2400 - 1860 = 540 u n i t s$
$∴$ The average sales for the moth November and December $= \frac{540}{2} = 270 u n i t s$

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The average sales of Saraswati Motors from January to June are 150 units. Its average sales from July to October are 240 units. What is the average sales (in units) for the months November and December, if the average sales for the year are 200 units?

The average sales of Saraswati Motors from January to June are $150 u n i t s$ . Its average sales from July to October are $240 u n i t s$ . What is the average sales (in units) for the months November and December, if the average sales for the year are $200 u n i t s$ ?