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Archy [21]
2 years ago
14

How many 4-digits number can be formed out of 0,1,2,3,5,7 and 8. If:

Mathematics
1 answer:
Bad White [126]2 years ago
5 0

Answer:

Below in bold.

Step-by-step explanation:

No repetition.

There are a total of 7 numbers.

For the number to be even it must end in 0,  2 or 8.

The other 3 numbers will be the number of permutations of 3 from  the 6 other numbers.

Number of 4 digit numbers ending in 0

= 6P3 = 6! / 6-3!

= 120.

Now the number could also end in 2 or 8,

so there are 3*120 = 360 4-digit even numbers (no repetition).

With repetition.

There are 3 * 7^3 = 1029  with repetition.

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masya89 [10]

Answer:

4.

l=22cm

b:16cm

h:10cm

surface area =2(lb+bh+lh)=2(22*16+16*10+22*10)

=1464cm²

5.

a=2.5dm

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6.

r=1.5dm

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8 0
2 years ago
There is a bag filled with 5 blue, 2 red and 3 green marbles,
nikdorinn [45]

Answer:

0.62

Step-by-step explanation:

There are a total of 10 marbles in the bag.

P(blue and not blue) = 5/10 × 5/10 = 25/100

P(red and not red) = 2/10 × 8/10 = 16/100

P(green and not green) = 3/10 × 7/10 = 21/100

P = 25/100 + 16/100 + 21/100

P = 62/100

P = 0.62

Alternatively, you can calculate it this way:

P(both blue) = (5/10)² = 25/100

P(both red) = (2/10)² = 4/100

P(both green) = (3/10)² = 9/100

P = 1 − (25/100 + 4/10 + 9/100)

P = 1 − 38/100

P = 62/100

P = 0.62

5 0
2 years ago
What is the common ratio for the geometric sequence?
sashaice [31]
What is the common ratio for the geometric sequence?

24,−6,3/2,−3/8,...

Common ratio=-1/4

5 0
3 years ago
PLZ HELP omg
Mandarinka [93]

Answer:

1.75 hours and 2 Hours

Step-by-step explanation:

6 0
3 years ago
Find the value of x+10=11
drek231 [11]

Answer:

x=1

Step-by-step explanation:

×+10=11

-10 -10

x = 1

8 0
3 years ago
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