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Radda [10]
3 years ago
14

Một lô hàng có 6 chính phẩm và 4 phế phẩm, lấy ngẫu nhiên 2 sản phẩm. tìm kỳ vọng của số chính phẩm

Mathematics
1 answer:
lana66690 [7]3 years ago
4 0

Answer:

I'm sorry I didn't understand

Step-by-step explanation:

sorry

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Which of the following figures could represent the cross section of a rectangular pyramid? Select all that apply.
Rama09 [41]

Answer:

Options C and E

Step-by-step explanation:

Option A. Circle

We can't get a cross section in the form of a circle.

Option B. Cube

We can't get a cross section in the form of a cube.

Option C. Rectangle

When we slice a rectangular pyramid parallel to the base but not through the vertex, we get a Rectangle.

Option D. Square

We can not get a square by slicing a rectangular pyramid.

Option E. Triangle

By slicing a rectangular pyramid perpendicular to the base and passing through the vertex we can get the cross section in the form of  triangle.

Options C and E will be the answer.

4 0
3 years ago
A medicine instructs you to take 1 pill every 3.5 hours, and comes with 4 pills. How long will it last.?
Harlamova29_29 [7]

Answer:

14 hours

Step-by-step explanation:

If you need to take 1 pill every 3.5 hours then this suggest that the effects of 1 pill lasts for 3.5 hours.

Therefore, if you take 4 pills then they will last: 4 x 3.5 = 14 hours

4 0
3 years ago
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Chitra has 8 4/5 room
ycow [4]

Answer:

She can paint 4 rooms.

Step-by-step explanation:

8\dfrac{4}{5} \div 2\dfrac{1}{5}=\dfrac{(8\times 5+4) \times 5}{5 \times (2\times 5 + 1)}=\dfrac{44}{11}=4

8 0
3 years ago
Please solve this for me! Thank you so much I appreciate you. tpwk
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C

Step-by-step explanation:

5 0
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Question 2<br>0 Find 2/3 + 1/2​
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1 1/6

Step-by-step explanation:

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3 years ago
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