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3 years ago

How many 7 digit numbers have6 9 s and no 9 in ones place

Mathematics

1 answer:

Daniel [21]3 years ago

5 0

Answer:

1062882

Step-by-step explanation:

Seven digits numbers, with repetition of digits, having 6 or 9 at the last one's place :

The first six digits can be filled with 9 options each (numbers 1 to 9) , & the last digit can be filled with 2 options (number 6 & 9)

So, total 7 digit numbers as per given condition = 9 x 9 x 9 x 9 x 9 x 9 x 9 x 2 = 1062882

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castortr0y [4]

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3 years ago

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fenix001 [56]

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3 years ago

Answer my question pls

Maslowich

Answer:

the answer is 20

Step-by-step explanation:

5×12 = 60

which means he had 60 points feom hitting the target

60-20=40

therefor he lost 40 points miing the target

40÷2=20

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4 0

3 years ago

The only contents of a container are 4 blue disks and 8 green disks. If 3 disks are selected one after the other, and at random

-Dominant- [34]

Answer: B. $\dfrac{28}{55}$ .

Step-by-step explanation:

Given : Number of blue disks =4

Number of green disks = 8

Total disks = 12

Total number of combinations of drawing any 3 disks from 12 = $^{12}C_3$

Number of combinations of drawing 1 blue and 2 green disks = $^{4}C_1\times^{8}C_2$

Now , the probability that 1 of the disks selected is blue, and 2 of the disks selected are green will be :

$\dfrac{^{4}C_1\times^{8}C_2}{^{12}C_3}\\\\=\dfrac{4\times\dfrac{8!}{2!6!}}{\dfrac{12!}{3!9!}}\\\\=\dfrac{4\times28}{220}\\\\=\dfrac{28}{55}$

Hence, the correct answer is B. $\dfrac{28}{55}$ .

7 0

4 years ago

Given the values of x and y find the exact (fraction) values of all six trig ratios

Anna35 [415]

Answer:

Step-by-step explanation:

Distance of (-3,4) to origin = √((-3)^2+4^2) = 5

sinθ = 4/5

cosθ = -3/5

tanθ = 4/(-3) = -4/3

cscθ = 1/sinθ = 5/4

secθ = 1/cosθ = -5/3

cotθ = 1/tanθ = -3/4

4 0

3 years ago