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astraxan [27]
3 years ago
10

There are 47 people attending a play at an outdoor theater. There are 11 groups of people sitting in groups of 3 or 5. How many

groups of each size are there?​
Mathematics
2 answers:
Agata [3.3K]3 years ago
8 0

Answer:

Step-by-step explanation:

iVinArrow [24]3 years ago
4 0

Answer:

  • <u>The number of groups in 3 is 4 groups.</u>
  • <u>The number of groups in 5 is 7 groups.</u>

Step-by-step explanation:

Let the number of groups in 3 ⇒ x

Let the number of groups in 5 ⇒ y

There are 11 groups. ⇒ x + y = 11         →(1)

There are 47 people. ⇒ 3x + 5y = 47  →(2)

Solve (1) and (2) to get x and y.

From (1)  ⇒ y = 11 - x  →(3)

By substitution from (3) at (2) with y

∴ 3x + 5(11-x) = 47

3x + 55 - 5x = 47

-2x = 47 - 55 = -8

∴ x = -8/-2 = 4

∴ y = 11 - x = 11 - 4 = 7

So, the number of groups in 3 is 4 groups.

the number of groups in 5 is 7 groups.

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