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What is the probability of getting a black pen if you have 4 black pens 6 blue pens and 2 red pens?
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∙ 12y ago
one out of three
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∙ 12y ago
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8/11 of the pens in the are blue. The rest are black. There are 12 black pens. How many pens are blue?
If 8/11 pens are blue, then 3/11 are black. There are 12 black pens, so 12/(3/11) = 44. So there are 44 pens total. 44 * (8/11) tells us that 32 pens are black.
Why use black pens not blue?
black pens are neater and easier to read.
What is the plural possessive of pens?
The possessive form of the plural noun pens is pens'.Example: All of these pens' ink is blue, none are black.
A box contains a number of pens, 12 of which are red pens. The rest of the pens in the box are blue pens. If the probability of selecting a red pen is 3/8 how many blue pens are in the box.A) 17B) 19C) 20D) 21E) 18?
12 x 3 = 36 12 x 8 = 96 96 - 36 = 60 there are 60 blue pens in the box.
An office orders 34 boxes of red pens and 47 boxes of blue pens They want more black pens than red pens What is the smallest number of boxes of black pens they could order?
35.
If Ms Ann bought 118 black pens and She bought 57 fewer blue pens How many pens did she buy in all?
118 + (118-57) = 179
What color is the most common pen?
the most common coloured pens are blue and black.
Cedric has 4 pencils and blue pens and a black pen in his desk if he randomly draws two of them from the desk without replacement what is the probability he will draw the two pen?
This question has some missing information but the way you do this problem is to multiply fractions formed by probabilities. To draw two pens out of the drawer first take the ratio (fraction) of the number of pens over the total number of writing tools. Then, multiply that by one less on the top and the bottom. Lets say you have 4 pencils, 2 blues and 1 black. Seven total. 2/7*1/6=2/42 probability.
There are 20 red and blue pens in a box there are 3 times as many blue pens as red pens?
3b + r = 20 20/4=5 5x3=15 blue pens 5x1= 5 red pens
Who uses blue pens?
Many people use pens
How many backpacks out of 38 contained none of the three writing instruments?
First, I would like to say that the whole question is not here. The question states: upon examining the contents of 38 backpacks, it was found that 23 contained a black pen, 27 contained a blue pen, and 21 contained a pencil, 15 contained both a black pen and a blue pen, 12 contained both a black pen and a pencil, 18 contained both a blue pen and a pencil and 10 contained all three items. How many backpacks contained none of the three writing instruments? OK I will explain this the best I can! Starting out, their are 10 backpacks that contain all the items. 12 contained both a black and blue pen. You would subtract 10 from 12; therefore there are 2 backpacks that contain only black and blue pens. 18 contain both a blue pen and a pencil. subtract 10 from 18 and you get 8. 15 contained both a black pen and a blue pen. You would subtract 10 from 15 and you get 5. There are 23 with black pens. So you would do 23 - (5+10+2)= 6. There are 6 backpacks that contain only black pens. There are 27 that contain blue pens. So you would do 27 - (5+10+8) = 4. There are 4 backpacks that contain only blue pens. There are 21 backpacks that contain a pencil. You would do 21 - (2+10+8) = 1. All together, there a 6 that contain only black pens, 5 that contain only black and blue pens, 4 that contain only blue pens, 10 that contain all three items, 2 that contain only black pens and pencils, 8 that contains only blue pens and pencils, and 1 that contains only 1 pencil. So you would add 6+5+4+10+8+2+1= 36. There are 38 backpacks, so you would subtract 36 from 38. There are 2 backpacks that contain none of the three writing instruments. Ashfords quiz says this is right.
What color are black pens?
Black pens are typically dark in color, appearing as a deep shade of black.
