Barter system- A method of exchange when no money is involved.
B and C can't be the answers because they are not exchanging anything.
D can't be the answer either because there is money involved.
So your answer is A) You trade an apple for a banana at school. because you are exchanging something with someone for something else thats not money.
Hope this Helps!!
The number of expected males and females to brush their teeth at least twice a day are : 135 males and 147 females.
<h3>What is proportion?</h3>
Proportion refers to the part of the things or numbers which are comparable with each other. For example: the weight of the Rahul is 70kgs and weight of the Mohan is 100kgs. Thus the Mohan's weight is greater than the Rahul's weight.
The pooled samples by combining the sample proportion to that of the successes in the each samples and combining the sample sizes.
P^ = (122+160)/(210+228)= 282/438
Then multiply this pooled sample with the two sample sizes:
Expected males = n1*^p = 210(282/438) = 135.21
expected females =n2*^p = 228(282/438) = 146.79
Thus the expected numbers of males are 135 and expected numbers of females are 147.
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Answer:
A
Explanation: People who are on government positions are voted in by Citizens.
Answer:
to have a hardy personality.
Explanation:
A hardy personality is the ability of an individual to control his behavior in conditions of challenges and stress. He shows an outstanding level of commitment and control over himself. Stress can alter the daily functioning of an individual negatively by affecting his physically and emotionally. But people with hardy personality are less likely to be affected by these problems. The most important trait of a hardy personality is how they come out of the stressful situation by using the control and commitment of their strong personality.
