Among the eight numbers -9, 0, 15, -100, +8, -25, -4.8, (2/3), which of the following statements is correct is how many positive numbers there are
在-9、0、15、-100、+8、-25、-4.8、(2/3)这八个数中，下列说法正确的是正数有多少个
<result>3</result>