A bag

  

A bag contains 6 pennies, 5 nickels, 3 dimes, 4 quarters, 2 half-dollars, & 1 silver dollar. 

If I draw a single coin from the bag: 

What is the probability of drawing a silver-colored coin? 

A coin worth more than 20 cents? 

A coin with ridged edges? 

Probability of silver colored coin 

P(silver colored coin) = (21 - 6) / 21 = 15 /21 or 5/7 

. 

Probability of a coin worth more than 20 cents 

P( coin is > 20 cents) = ( 4 + 2+ 1)/21 = 7/21 = 1 /3  

. 

Probability of ridged edge coin: 

P(ridged edged) = (3 + 4 + 2+ 1)/21 = 10 /21 

Points = 28.5 + 0.31wages - 0.0002wages Squared 

How many more points will a team earn if they increase wages from £80 to £100 million