# The coin is thrown 4 times. Find the probability that the emblem will fall out 2 to 3 times

June 30, 2020 | Education

| We write down all possible combinations for 4 coin tosses. To test ourselves, we immediately calculate that they should turn out n = 16! Here they are:

OOOO, OOOP, OOPO, OOPP, OPOO, OPOP, OPPO, OPPP,

POOO, POOP, POPO, POPP, PPOO, PPOP, PPPO, PPPP.

Now select those where the eagle occurs 2 or 3 times: OOOP, OOPO, OOPP, OPOO, OPOP, OPPO, POOO, POOP, POPO, PPOO,

there will be m = 10. Then the probability is P = m / n = 10/16 = 5/8 = 0.625

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.