To win at lotto in one state, one must correctly select 4 numbers from a collection of 61 numbers (1 through 61). the order in which the selection is made does not matter. how many different selections are possible?

If order matters, the number is 61 * 60 * 59 * 58 = 12,524,520

Since the order does not matter, the number is 12,524,520/(4 * 3 * 2 * 1) = 521,855

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: