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Red hair is a genetic mutation. To have red hair, you need to inherit two recessive genes (one from the father, one from the mother). Inheriting one recessive gene will make you a carrier, but you will not have red hair. Because of this, it's a fairly low proportion of the world population- around 1-2%. With a world population of 7,000,000,000 though, this adds up to around 140,000,000. Redheads are most heavily concentrated in Western/Northern Europe (Europe as a whole is 4% red head), the US and Australia (although they are found around the world).
Within a gene-pool, carriers of the recessive gene repeatedly having children together leads to high concentrations of offspring with two recessive genes, and so concentrated populations of red heads. The highest proportion of red heads in the world is in Scotland, at around 13%, followed by Ireland at 10%. In terms of numbers, the US (at 2-6%) has the largest red-headed population.
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How many possible outcomes are there when you toss a coin and spin the pointer on a spinner with 5 colors?
There are 10 possibilities. For every space on the spinner you land on, there are two other outcomes (heads and tails). Say the colors are Blue, Green, Yellow, Red, and Purple. Here would be the final outcomes. Blue - heads or tails Green - heads or tails Yellow - heads or tails Red - heads or tails Purple - heads or tails
What is the percentage of red heads in the US?
Only 2% of Americans have red hair.
How many outcomes are there when tossing a coin three times?
1heads heads heads 2heads heads tails 3heads tails heads 4heads tails tails 5tails tails tails 6tails tails heads 7tails heads tails 8tails heads heads
What are the odds if a coin is tossed 3 times and the out come is heads?
The answer depends on "the outcome is heads HOW MANY TIMES!"
If you flip a coin 4 times how many possible outcomes are there?
There are 24 = 16 ordered outcomes, that is outcomes in which the order of the results is relevant. If not, there are 5 outcomes (0 heads, 1 head, 2 heads, 3 heads and 4 heads).
