x 0 1 2 3 4 5
P( X = x) 0.20 0.25 0.20 0.15 0.10 0.10
Find P( X 3)
11. Accepted characters: numbers, decimal point markers( period or comma), sign indicators(-), spaces( e. g., as thousands separator, 5 000), " E " or " e "( used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form( a + bi) where " a " and " b " need to have explicitly stated values.
For example: { 1 + 1i } is valid whereas { 1 + i } is not. { 0 + 9i } is valid whereas { 9i } is not.
If a gambler rolls two dice and gets a sum of four, he wins $ 10; and if he gets a sum of three, he wins $ 25. The cost to play the game is $ 5. What is the expectation of this game?
Place your answer, rounded to two decimal places, in the blank.-2.88 When entering your answer do not use a dollar sign. However, if the expected payoff is negative be sure to use a minus sign. For example,-1.23 would be a legitimate entry
12. Accepted characters: numbers, decimal point markers( period or comma), sign indicators(-), spaces( e. g., as thousands separator, 5 000), " E " or " e "( used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker.