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3 years ago

Pls help math esperts

Mathematics

2 answers:

MaRussiya [10]3 years ago

6 0

Answer:

Jackson spent $4.25 on his lunch

Step-by-step explanation:

because $6.50- $2.25 is $4.25

sashaice [31]3 years ago

5 0

Answer:

$4.25

Step-by-step explanation:

so for this problem you need to solve for jackson the way you do this is you take Matt's price for lunch and subtract it by the 2.25 to get jackson's answer cuz Matt spent $2.25 more than jackson

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2 years ago

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3 years ago

In how many ways can 3person study groups beselected from a class of 25students?Note: nrn!r!(n-r)!nEnter

nlexa [21]

Answer:

2,300

Explanation:

This is given as:

$\begin{gathered} 25\text{ combination 3 represented as:} \\ ^nC_r=\frac{n!}{r!(n-r)!} \\ n=25 \\ r=3 \\ ^{25}C_3=\frac{25!}{3!(25-3)!} \\ ^{25}C_3=\frac{25\times24\times23\times22!}{3!\times22!} \\ ^{25}C_3=\frac{25\times24\times23}{3\times2\times1} \\ ^{25}C_3=2300 \end{gathered}$

Therefore, there are 2,300 ways that 3 persons can be selected from 25 people

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