$C(12,2)\cdotC(17,2)\cdotC(16,3)\cdotC(20,3)=\\\\\dfrac{12!}{2!10!}\cdot\dfrac{17!}{2!15!}\cdot\dfrac{16!}{3!13!}\cdot\dfrac{20!}{3!17!}=\\\\\dfrac{11\cdot12}{2}\cdot\dfrac{16\cdot17}{2}\cdot\dfrac{14\cdot15\cdot16}{2\cdot3}+\dfrac{18\cdot19\cdot20}{2\cdot3}=\\\\66\cdot136\cdot560\cdot1140=5,730,278,400$

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3 years ago

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Seb made a jump of two and a half meters Kirsty's jump was 10 centimeters longer how long was Kirsty's jump

hoa [83]

First of all, a meter is equal to 100cm.
$1m=100cm$

Seb made a jump of two and a half meters. ( $2 \frac{1}{2}$ or $2.5$ )
Multiply 100 by 2.

$100*2=200$

Now we need the half.
What is half of 100?
50 is half of 100.

So, add 50 to the 200.

$200+50=250$

Kirsty's jump was 10 centimeters longer.

Add 10 centimeters to the 250 centimeters.
$250+10=260$

Kirsty's jump was 260 centimeters high, or 2.55 meters.

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3 years ago

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