0
What are the chances you are going to toss 2 pennies 20 times How many times do you expect the 2 pennies will come up 1 head and 1 tail?
Wiki User
∙ 15y ago
The key to probability is to identify how many outcomes are possible.
Put a bunch of pennies on the table and have your son move them around to indicate how many possibilities there are for arranging two coins. He will quickly find that he can have HH, TT, HT, or TH
So tossing two pennies will work out in one of these arrangements -- no matter how many times they're tossed.
Probability is a fraction: the number of outcomes that match the criteria [I call these 'winners'] over all possible outcomes. Each of the outcomes in the list, then, has a 1/4 chance of happening. However, 2 of the outcomes result in one head and one tail [the order doesn't matter], so we can group thise to give the 1head-1tail choice a total probability of 1/2
Once you have the basic fraction of probability, he can multiply that by the number of tosses to work out the specific answers for your questions above
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
How many times does 6 pennies go into a dollar?
6 pennies go into a dollar about 16 times
How manny pennys in 43000 dollars?
1 dollar equals 100 pennies 43000 times 100 equals.........4,300,000 pennies
You roll a 6 faced die 90 times about how many times would you expect to get a 5?
You can expect to get a 5 about 15 times out of 90.
How do you make one dollar using 22 coins and 3 times as many nickels as pennies?
2 dimes, 15 nickels, 5 pennies
How many pennies to make 20 dollars?
2,000 pennies in 20 dollars (100 in 1 dollar times 20)(100x20 equals 2,000)
What are the chances you are going to toss 2 pennies 20 times How many times do you expect the 2 pennies will come up 2 tails?
10
What are the chances you are going to toss 2 pennies 20 times how many times do you expect the 2 pennies will come up 2 heads?
Each time you toss two pennies, there are four ways they can land: H H H T T H T T One of the four ways is (Heads - Heads), so the probability of 2 heads is 1/4 or 25% . If the pennies are 'fair' (not loaded), and you toss them a large number of times, you should expect 2 heads roughly 1/4 of the time. Out of 20 tosses, that's 5 times. But don't bet on it.
You are going to toss 2 pennies 20 times how many times do you expect the 2 pennies will come up as 2 heads?
5 times.When tossing 2 pennies there are 4 equiprobable outcomes or events with 1/4 ofprobability for each to happen:P(H,H) = 1/4P(H,T) = 1/4P(T,H) = 1/4P(T,T) = 1/4So if you toss 2 pennies 20 times, the "expected" number of times that 2 heads (H,H)will come up is 1/4 of the 20 times, that is 5 times.
How many times does 6 pennies go into a dollar?
6 pennies go into a dollar about 16 times
How many 10.00 are in one million pennies?
100 pennies = $1.00 so 10 times as many pennies = 10 times as many dollars 1000 pennies = ten dollar bill 1,000,000 pennies/1,000 = 1,000 ten dollar bills (aka $10,000.00)
How many pennies would it take to save nine thousand dollars?
100 pennies in a dollar times 9000 or 900,000 pennies
What fraction when 2 pennies are tossed 1000 times?
Out of the 1,000 tosses, you should expect to see 2 heads 250 times (1/4 of them), 2 tails 250 times (1/4 of them), and one of each 500 times (1/2 of them). Out of the 2,000 coin faces that show, you should expect to see very close to 1,000 heads (1/2 of them) and 1,000 tails (1/2 of them).
Are pennies necessary?
Honestly I do think pennies are necessary, because in this econmy times are hard , and pennies have value plus we need all the help we can get.
How many pennies are in two dollars?
There are 100 pennies in one dollar, so two dollars is two times 100, or 200 pennies.
How many times will you get if you toss 2 pennies 20 times?
40
How many pennies in a bob in Victorian times?
"Bob" was the slang term for a Shilling. There were 12 Pennies to the Shilling.
How much is 500 lbs of pennies worth?
Using the weight of modern zinc pennies (those minted since 1982), one cent weighs 2.5 grams. One pound is 453.59 grams, making 181.4 pennies per pound, times 500 is 90,700 pennies, which is $907. Note: some of these figures were rounded up instead of going 3 or more decimal places.
