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kvasek [131]
2 years ago
12

At the Royal Dragon Chinese​ restaurant, a slip in the fortune cookies indicates a dollar amount that will be subtracted from yo

ur total bill. A bag of 10 fortune cookies is given to you from which you will select one. If six fortune cookies contain ​"$1 ​off," contain ​"$3 ​off," and contains ​"$6 ​off," determine the expectation of a selection.
Mathematics
1 answer:
Afina-wow [57]2 years ago
5 0

Answer:

We can expect $1.7 off

Step-by-step explanation:

We are given 10 fortune cookies out of which

$1 off  = 7 cookies

$2 off = 2 cookies

$6 off = 1 cookie

Probability

A = drawing $1 off cookies    P(A) = 7/10

B= drawing $2 off cookies    P(B)  = 2/10

C= drawing $6 off cookie      P(B)  = 1/10

Expectation = 1*7/10 + 2*2/10+ 6*1/10

                   = 7/10  +   4/10  + 6/10

                   =  17/10 = $1.7 off

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alexandr402 [8]

7√7

using the ' rule of radicals '

• √a × √b ⇔ √ab

simplifying the radicals

√28 = √(4 × 7 ) = √4 × √7 = 2√7

√63 = √(9 × 7) =√9 × √7 = 3√7

√112 = √(16 × 7 ) = √16 × √7 = 4√7

substituting into the expression

3(2√7) - 5(3√7) + 4(4√7) = 6√7 - 15√7 + 16√7 = 7√7


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3 years ago
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3 years ago
0.4(2-q=0.2(q+7) hurry please
Lerok [7]

Answer:

q=-1

Step-by-step explanation:

.8-.4q=.2q+1.4

-.2q       -.2q

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-.8         -.8

-.6q= 0.6

/-.6    /-.6

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3 years ago
I need help with this I have no clue what to do so please help me.
Juli2301 [7.4K]

Answer:

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Step-by-step explanation:

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3 years ago
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1) A basket of apples are given to a group of students. If 3 apples are given to each student, there will be 8 apples left. If 5
sattari [20]

Answer:

1) either 5 or 6 students in the group

2) 6 rooms are booked

Step-by-step explanation:

1) x students  

3x + 8 = apples

5 (x-1) + y (the one get less than 5 apples)

3x + 8 = 5 (x - 1) + y

3x + 8 = 5x - 5 + y

2x + y = 13

X       1       2      3      4      5      6

Y       11      9      7      5      3       1

because y < 5 so x = 5 or x = 6

2) x rooms are booked

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4x + 20 = 8 (x-1) + y

4x + 20 = 8x - 8 + y

4x + y = 28

X       1       2      3      4      5      6

Y       24    20    16    12     8      4

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