We have that for 95% of confident, the value of z has a value of 1.96 (attached table about it), they also mention the margin of error (E) that is 10 and finally the standard deviation (sd) that has a value of 221.
Let us compute first the probability of ending up an odd number when rolling a dice. A dice has faces with numbers 1 up to 6. The odd numbers within that is 3 (1, 3 and 5). Therefore, each dice has a probability of 3/6 or 1/2. Then, you use the repeated trials formula:
Probability = n!/r!(n-r)! * p^r * q^(n-r), where n is the number of tries (n=6), r is the number tries where you get an even number (r=0), p is the probability of having an even face and q is the probability of having an odd face.
Probability = 6!/0!(6!) * (1/2)^0 * (1/2)^6 Probability = 1/64
Let x be equal to the number of drinks Yasmine consumed. Jose had 2 times that drink so his number of consumed drink would be represented by 2x. Sally had 3 fewer drink than Jose so her number of consumed drinks would be represented by 2x-3. Altogether, the three of them consumed 72 drinks so your equation would be: x+2x+(2x-3)=72 add like terms together: 5x-3=72 have the term with x be alone on one side of the equation, in this case by adding three to both sides: 5x=75 now divide both sides by five for the value of x and your answer is..... x=15
