Maths
posted by OIan .
Five red cards numbered 1,2,3,4,5 and two black cards both numbered 5 are randomly ordered facedown into a pile. The cards are flipped over one at a time until either the sum of the numbers on the red cards is at least 10, or the sum of the numbers on the black cards is at least 10. The probability that the sum of the black cards reaches 10 first can be expressed as a/b where a and b are coprime positive integers. What is the value of a+b?
Respond to this Question
Similar Questions

statistics
The red face cards and the black cards numbered 29 are put into a bag. Four cards are drawn at random without replacement. Find the following probabilities: a) All 4 cards are red b) 2 cards are red and two cards are black c) At least … 
probability
Consider a deck of 52 cards with the following characteristics: 13 red cards, numbered 1 through 13 13 blue cards, numbered 1 through 13 13 green cards, numbered 1 through 13 13 black cards, numbered 1 through 13 1. Describe the steps … 
Probability
Consider a deck of 52 cards with the following characteristics: 13 red cards, numbered 1 through 13 13 blue cards, numbered 1 through 13 13 green cards, numbered 1 through 13 13 black cards, numbered 1 through 13 1. Describe the steps … 
Math
Five red cards numbered 1,2,3,4,5 and two black cards both numbered 5 are randomly ordered facedown into a pile. The cards are flipped over one at a time until either the sum of the numbers on the red cards is at least 10, or the … 
Math
Need help on how to solve this problem.. Five cards are chosen from a deck of playing cards and put into a pile. Three of the cards are red and 2 of the cards are black. A second pile is made using 2 red cards and b black cards. One … 
math
jake has 6 cards. 4 of his cards are red and 2 cards are blue. Alicia also has 6 cards. half of her cards are red. who has more red cards. 
3rd grade math
A pile of index cards has a mixture of white, pink, yellow, red, and blue cards. Some cards are lined, and some are unlined. The total number of cards is 150. 2/5 of the cards are blue, 10 cards are white, and 10 cards are red. Half … 
Calculus
Joe dealt 20 cards from a standard 52card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards … 
Math
Brent counted 10 red cards, 10 black cards, and 20 blue cards in a deck of cards. What is the ratio of red cards to the other cards? 
Cards
As shown above, a classic deck of cards is made up of 52 cards, 26 are black, 26 are red. Each color is split into two suits of 13 cards each (clubs and spades are black and hearts and diamonds are red). Each suit is split into 13 …