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3 years ago

4 friends participated in a speed typing contest. Who has the slowest typing speed

Mathematics

2 answers:

kow [346]3 years ago

8 0

F3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Black_prince [1.1K]3 years ago

8 0

As per the problem

4 friends participated in a speed typing contest.

And the words per minute is as below:

F1: 320 words in 8 minutes

It mean the words per minute is $\frac{320}{8}= 40$

F2: 403 words in 10 minutes

It mean the words per minute is $\frac{403}{10}= 40.3$

F3: 474 words in 12 minutes

It mean the words per minute is $\frac{474}{12}= 39.5$

F4: 567 words in 14 minutes

It mean the words per minute is $\frac{567}{14}= 40.5$

On comparing the number of words per minutes in all the above cases we observe that F3 has the slowest Typing speed.

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$C_{(\boldsymbol{n}, \boldsymbol{m})}=\frac{n !}{m !(\boldsymbol{n}-\boldsymbol{m}) !}$

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A committee consisting of 4 faculty members and 5 students is to be formed. There are 12 faculty members and 13 students eligible to serve on the committee.

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$\begin{array}{l}{12 C_{4} \times 13 C_{5}} \\\\ {=\frac{12 !}{4 !(12-4) !} \times \frac{13 !}{5 !(13-5) !}} \\\\ {=\frac{12 !}{4 ! 8 !} \times \frac{13 !}{5 ! 8 !}} \\\\ {\frac{12 \times 11 \times 10 \times 9 \times 8 !}{27 \times 8 !} \times \frac{13 \times 12 \times 11 \times 10 \times 9 \times 8}{120 \times 8 !}} \\\\ {=637065}\end{array}$

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3 years ago

4) How much pizza sauce is needed to cover a 16" pizza? (Note: 16" is the diameter of the pizza.) A) 50.24 in2 B) 200.96 in2 C)

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So the correct answer is letter B. 200.96 in^2

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3 years ago