0029【Edabit ★☆☆☆☆☆】Profitable Gamble

0029【Edabit ★☆☆☆☆☆】Profitable Gamble

conditions math validation

Instructions

Create a function that takes three arguments prob, prize, pay and returns true if prob * prize > pay; otherwise return false.

To illustrate:

profitableGamble(0.2, 50, 9)

… should yield true, since the net profit is 1 (0.2 * 50 - 9), and 1 > 0.

Examples

profitableGamble(0.2, 50, 9) // true
profitableGamble(0.9, 1, 2) // false
profitableGamble(0.9, 3, 2) // true

Notes

• A profitable gamble is a game that yields a positive net profit, where net profit is calculated in the following manner: net_outcome = probability_of_winning * prize - cost_of_playing.

Solutions

function profitableGamble(prob, prize, pay) {
    return prob * prize > pay ;
}

TestCases

let Test = (function(){
    return {
        assertEquals:function(actual,expected){
            if(actual !== expected){
                let errorMsg = `actual is ${actual},${expected} is expected`;
                throw new Error(errorMsg);
            }
        }
    }
})();

Test.assertEquals(profitableGamble(0.2, 50, 9), true)
Test.assertEquals(profitableGamble(0.9, 1, 2), false)
Test.assertEquals(profitableGamble(0.9, 3, 2), true)
Test.assertEquals(profitableGamble(0.33, 10, 3.30), true)
Test.assertEquals(profitableGamble(0, 1000, 0.01), false)
Test.assertEquals(profitableGamble(0.1, 1000, 7), true)
Test.assertEquals(profitableGamble(0, 0, 0), false)