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3 years ago

11

Ron practiced piano 1 2/3 hours on monday and 5/6 hour on tuesday. how much did he practice in all those two days

1 answer:

insens350 [35]3 years ago

4 0

2.5 hours i think but i might be wrong :)

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Afina-wow [57]

Answer:

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Step-by-step explanation:

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Read 2 more answers

The weights of bags of ready-to-eat salad are normally distributed with a mean of 290 grams and a standard deviation of 10 grams

pentagon [3]

290-10=280

280 is one standard deviation below.
All that are above mean is 50%.
One standard deviation below is 34%.
50%+34%=84% all of these bags weigh more than 280 g.
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100%-84%=16% should be bags that are less than 280 g.

Answer is b) 16 %.

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3 years ago