There are two bags: a bag with 4 blue marbles and 6 black marbles and another one containing 6 blue marbles and <span>6 black marbles. the probability of getting a blue marble in the first bag is 6/10 or 3/5 while that on the second bag is 6/12 or 1/2. Hence the total probability of getting two marbles is c. 3/10. </span>
The predicted time remaining has decreased by 30 years, so the second one would be the answer
Answer:

Step-by-step explanation:
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Suggest or assume the existence, fact, or truth of something as a basis for reasoning, discussion, or belief.