A junk box in your room contains 16 old batteries, 6 of which are dead. Define the random variable X = the number of working batteries in a sample of 4 batteries from the junk box.

a) Name the distribution, with specific parameter values, which can be used to model X.

b) Write out the correct formula, with specific numbers substituted, to find ( 1). Do not solve.

All numerical answers should be accurate to two decimal places (nearest hundredth); however, probabilities should be reported to four decimal places, if applicable.